That is what I suppose, they are all based on a tank platform so their ability to fight high intensity warfare should stand out among all platforms in the Russian army. Until now (from what I see because I am just getting started with land forces structure) the IFVs had no significant difference between different units, BMPs from 1 to 3 are lightly armoured at best, but with the T-15 (they don't even call it BMP-x) I guess there is a doctrinal change happening.
They are changing from vehicle types to vehicle families... at the moment a BMP-2 is a specific vehicle, but the support vehicles it is based on are not called BMP-2xxx... the BMR-3M for instance is a tank based armoured engineering vehicle used for mine clearing... it is based on a T-72 by the looks of it and is not related to the BMP... the UR-77 minefield breaching vehicle is based on the MTLB, the IRM engineer recon vehicle is based on the BMP-1 and is used on land and in the water for recon... water currents and depths in rivers, ice thicknesses, presence of mines, etc etc.
The TOS system is based on a T series tank, as is MSTA, and the BMO-T Engineer troop transporter is tank based.
I am guessing the easiest way to do it is to pick which forces will be which type of new forces... ie top priority forces intended to fight HATO equipped enemies in built up areas will have their T-90s replaced with T-14s, and their BMP-3s replaced with T-15s an their engineer BREM vehicles replaced with T-16s... they wont get Kurganets or Boomerang vehicles.
Lower echelon units that don't need Armata level vehicles will likely keep their MBTs... they will probably get T-90s from the top units, but if the areas they will operate in will be firm and with good roads they may get Boomerang based IFVs and BTRs to start with and they other types as they complete testing... in places with soft ground and not so great roads they will get Kurganets B-11 BMPs and likely Kurganets BTRs, and T-90s from units above them.
As more types of each vehicle is produced it will enter service so to start with the units with Armata will have T-14s and T-15s and T-16s and likely the BTR/APC version with the Kord HMG in the small turret, and also the 2S35 Coalition and probably an Armata chassis with the 2S38 57mm AA gun vehicle too etc etc.
As the new models complete testing the Armata forces will replace all existing types like T-90 and ACRV-2 and BMP-3 with a T-xx vehicle based on the Armata chassis... they will likely replace regiments at a time depending on the speed of production...
Logistics-wise it makes sense to standardize all vehicles, but cost-wise maybe not. For auxiliary vehicles it is questionable whether the cost, weight and levels of protection of a vehicle based on the Armata platform would make sense.
They have complete control of what they develop and replace... they might leave the command vehicles till last for instance, but the point of the exercise is standardised vehicle families to minimise logistics.
The number of Armata units is not going to be a large fraction of the Russian Army it just would not be affordable... and nor would it even be necessary.
What is needed, beyond what we know? They talk now about the BMPT, what more? Maybe Armata-based Deivatsiya? Well, it could be essentially the same as the BMPT but for the ATGM part. Not even artillery units would need that level of protection I guess, and creating anti-tank units in an Armata division seems redundant.
Well BMPT is a fighting vehicle intended to suppress enemy infantry for use in places where your own infantry are too vulnerable to deploy and you don't want to deploy BMPs because of their weak armour making them vulnerable. In an Armata unit a BMP and a BTR have tank levels of armour so their anti personel and anti IFV weapons should make them pretty good substitutes, but a separate BMPT likely with a 57mm gun would be useful anyway so why not make a few extra turrets and you can use them if they work out useful... I am sure the Air Force would like a light wheeled vehicle like a 6x6 Typhoon vehicle with a BMPT turret with enormous fire power to roll round their airfields preventing attack from air or ground forces...
Armata divisions could still use anti tank units... a motor rifle armata division will not have the same number of tanks as the tank division so the anti tank units will still be needed... plus they will probably have 30km range and 100km range Hermes missiles for hitting all sorts of targets...
AFAIK a tank division has three tank regiments and a BMP regiment and the motor rifle division has the reverse... three BMP regiments and one tank regiment... and a regiment is three platoons of four tanks plus a command tank, so that would be 13 tanks in a motor rifle division and three regiments in a tank division so 13 times three is 39 tanks per division. But then I seem to remember there were 31 tanks in a tank division.
I remember with the Military Technology magazine I used to get they had an annual with force lists for every country, and it would list all the vehicles in a force... if we had one of those we could see which vehicles are tank based, which are BMP based and which are BTR based and BRDM based and GTSM based and MTLB based and those based on other vehicle types and work out what versions each family would need to replace them all.