You are wrong. On the gorshkov, there is no enough deapth to allow bigger, or should I say longer, missile inside te redut VLS. That's why UKSK are mounted higher on the deck and closer to mid-ship where there is more deapth inside the ship.
Since the begining they knew very well the redut launcher would be limited to smaller missiles only.
That will also be a huge issue for implementing UKSK-M as it will need to carry the longest missiles in their inventory so they will be very limited to where they can place it on the ships. Especially for smaller frigates and corvettes. Uksk and redut had more flexibility as the second one is smaller and could go where uksk couldn't.
You are not understanding what I am saying.
The Redut system is a SAM launcher for S-350 and S-400 missiles and it is the same across the different sized ships.
The only reason the hatch covers for them are 1m square is so that the old Rif and Rif-M and therefore also the new big missiles of S-400 with 250km and 400km flight range could be loaded in to them.
On smaller boats they might not have the depth to load those big missiles, so what are they going to do?
Create a special Redut launcher that only takes small missiles that is totally different from the Redut fitted to bigger vessels that is not compatible in any way shape or form, or are they going to develop a shallow depth Redut that is otherwise the same as the ones of the bigger vessels.
I would suggest the latter makes the most sense... the current long range SAMs for the Russian Navy at the moment is the Rif and Rif-M which are very old model S-300PMU missiles and currently the 9M96 in the two sizes and the 9M100 missiles are so far the only missiles they have for Redut. They are expanding that to include the new S-400 large missiles with a 250km and 400km range but I rather doubt they would fit them to anything smaller than a Frigate at best simply because a ship that is smaller wont have the air search radar range to detect targets at such distances.
But if they are not going to put big missiles on small ships why standardise the tubes to the big missiles... and the key word there is standardise.
The Redut launchers on smaller boats might never carry the big SAMs because they might not fit them that deep in the hull... 9M96 missiles are about 4.8m long while S-300 and the big S-400 missiles are about 7.5m long.
The point is that the redut launcher is designed to fit on all their new and upgraded ships and to take their entire range of new missiles... and if the 7.5m long S-300 Rif missiles wont fit then the UKSK-M system wont fit either because it will need to carry rather bigger cruise and ballistic missiles as well as likely the S-500 system as well.
So if the smaller boats have Redut then why have a 1 square metre launch area under each hatch when 9M96 missiles fit 0.47m tubes, and for that matter the other missile they carry... the 9M100 has been confirmed to fit four into each 0.47m 9M96 tube.
If the 9M100 fits four to a 9M96 tube, then why not put four 9M96 tubes in each Redut tube because the space is there that is why the 9M96 was designed to be the size it is... so each launch space on a land based S-300 or S-400 could carry four of the smaller missiles.
What eventually happened is that they decided to go for a whole separate system called S-350 but that does not change the size and shaping design of these missiles.
A land based 12 tube launcher on each S-350 TEL can hold 12 9M96 missiles because the tubes are 0.47m across and are 9M96 launch tubes.
The Redut sea based vertical launch system is designed to carry Rif and replacement missiles at sea... the land based S-300 is called V for the Army, P for the Air Force, and the sea based system is called F, so the Redut system is designed to carry the S-300F and the S-350F and the S-400F... its main failing will probably be that it wont be able to fit the S-500F, so the UKSK-M will be needed.
But the UKSK-M would make no sense if it can only carry one missile per tube so even it will likely carry 4 9M96 missiles or 16 9M100 missiles per tube... due to its length perhaps being 10-12 metres it might even allow stacking of missiles.
That will also be a huge issue for implementing UKSK-M as it will need to carry the longest missiles in their inventory so they will be very limited to where they can place it on the ships. Especially for smaller frigates and corvettes. Uksk and redut had more flexibility as the second one is smaller and could go where uksk couldn't.
Without multi missile packing a UKSK-M launch tube makes no sense, and neither does the redut.
If you think for a second that the Redut system on a small ship does not have the depth for larger missiles, but the tube and hatch size is dictated by the size of the biggest missile it can potentially take, which on larger vessels would be the S-400 for the moment but could be bigger with the S-500, then you either throw standardisation out the door and split the Redut tubes by a quarter to make each hatch a single hatch for a 0.47m square S-350 9M96 and redesign it with four times more hatches and hatch mechanisms, or you leave it the way it is and confuse the western experts who will assume the tube capacity is a quarter of what it will actually normally carry and a further quarter less that it actually could carry (with 9M100 missiles).
The vast majority of air defence needs can be met with the Redut system with 5-15km range 9M100 missiles for CIWS defence, and with 60km and 150km 9M96 missiles. Very occasionally a target will present itself further away and they have said they have two other missiles developed for the Redut (which is a naval system that could carry 1m square missile tubes unlike the land based S-350 which has 9M96 diameter tubes) and they mentioned those bigger missiles had a range of 250km and 400km... now as the S-500 has a range of 600km this then sounds like the standard and long range S-400 big missiles... which suggests Redut can carry the big missiles.
It would be inefficient to design it for big missiles but only load small missiles in it... especially one 0.47m square missiles in a 1 sq metre tube under a 1 sq metre hatch.
For small boats it wont matter much they can have shallow Redut that can only carry the smaller 9M96 and 9M100 missiles, but for really big vessels they will want all UKSK-M launchers so they can have big SAMs including S-500... but they will still want small SAMs too.