The problem I have is only with how it's implemented in practice. The bow gunners are at the front corners of the vehicle, making them vulnerable.
But in an T-72 vehicle the crew in the hull are behind the main hull armour and by the look of it that is heavier than the turret armour which is not there because the vehicle essentially has the turret crew below the hull line so the turret is essentially an external weapon mount with the guns and missiles poking out and the turret crew behind the front hull armour.
I have the same issue with the bow gunners in the sense that the limited angles for their guns and optics limit the range of targets they can engage most of the time.
They are also a little under armed, a grenade launcher might not be ideal to deal with far-off threats in time, or positions on the upper floors of buildings.
The problem I see for the grenade launcher gunners is that they will likely only have a load of 300-400 grenades which is not a lot. Of course whether 30mm or 40mm grenade launchers such rounds would be vastly more effective at ranges of 2-2.5km than rifle calibre machine gun fire or even HMG calibres simply because explosive rounds spread fragments around the impact point whereas bullets either hit or miss.
I'd rather advocate the Armata approach here. The vehicle should be redesigned in such a way so that the bow gunners are sufficiently inside the vehicle and protected, maybe like the infantry complement of a T-15 would be for instance. Or alternatively base the vehicle on the T-14 chassis and expand the crew capsule so that it fits 5; 3 on the front row, and the 2 bow-gunners back to back facing the sides sitting behind the front row.
One of the early model BMPTs had waist gunner positions just behind the turret on the sides of the vehicles which would be interesting.
A low flat unmanned turret with a rifle calibre machine gun and a 40mm grenade launcher which are both relatively compact slim weapons would be useful yet compact enough to use in a low flat turret with decent traverse and elevation.
Even having the gun mounts bulge out a bit to improve firing angles could improve field of regard.
It should be kept in mind that the main failing of old tanks with lots of independent turrets was communication and coordination.... but with modern optics and comms and computerised optical systems a modern tank commander is going to spot lots of targets needing to be engaged and he can direct the driver to angle the vehicle to allow the two waist gunners to engage many of the targets while the main gunner concentrates on threats to the vehicle.
Low flat external gun mounts would be an interesting addition to the turrets we have seen so far... fitting a couple on vehicles could allow multiple threats to be engaged at one time managed by a commander with 360 degree views directing gunners to engage targets... the commander could punch in the angle direction and give range to the gunner to locate the target to be engaged... the gunner then attacks the target while the commander continues to look for targets and threats for other gunners to deal with.
Only instead of the physical monitors you might want to use VR headsets, to save space.
Useful for aircraft as well as land vehicles...
Kord 12.7mm remote towers further back on the sides. Perhaps with a couple of thermobaric missiles attached to each.
A 57mm or 80mm rocket pod perhaps...
If needed, the height of the main turret can always be increased, to avoid obstruction.
A raised turret would allow mini flat turrets to be placed around it front and rear giving good coverage and good fields of fire, but being unmanned you could minimise the added weight penalty such turrets create. For a vehicle like T-15 the rear troop compartment could include gunners at consoles as well as extra ammo... so three positions in front of the turret for driver gunner commander and four more gunners at consoles in the rear plus ammo in the place where the other four troops would normally be seated.
It's called trialing and testing. There's nothing retarded about it, as it's just an exercise, not a real war. The MoD will draw its own conclusions.
Multi turreted tanks failed, but the technology simply wasn't available and indeed the tank training and tactics had not matured to the point where it could be properly tested.
These new low profile gun turrets don't need huge optics a small optics mount to see where the gun is pointing is all that is really needed... the commanders optics need to be bigger and more capable to find targets but from the commanders optics you can determine angle and distance to the target so the gun mounted optics just need to look at a particular angle and at a specified range and should be able to pick up the target relatively quickly.
A bit like a commander in the field with a group of riflemen... he uses his binoculars to find targets and orders individual soldiers to look for targets on a specific bearing or reference at an approximate distance to engage.