Sending T-80UD from the storage means one thing only - they will refurbish them, too.
As a whole fleet of 80UD left in Russia was about 200 pcs, I hardly believe they would worry about such a homeopathic number. But that would mean that they are taking seriously the 6TD-1 restoration, and that is only a step from increasing the potential to rebuild ... T-64.
This decision would increase the reserves of tanks to be produced ... by some 30%. We talk a few thousand pieces.
In the link Arrow posted they mentioned the T-80UD being sent for upgrades, but as you mention they didn't get a lot of those, which suggests either they are going to put gas turbines in them or they have perhaps developed a diesel engine for replacement of the engine in the T-80UD, which has implications.
If they have a new diesel engine for upgrades they can put into T-80UDs then perhaps they can also put those engines in older model vehicles to replace the gas turbines.
Equally new production aircraft turbines the Russians have made have been better than the engines they received from Ukraine which suggests better quality materials and improved designs to improve performance and power and efficiency.
So will these vehicles get GTs or improved Russian made diesels?