The whole point of vehicle families is to reduce the logistics tail, so mixing vehicle families within one grouping will only recomplicate the logistics...
there is no other MBT platform than 'Armata'. As well as I doubt there will b, say, bridging vehicles based on Boomerang. And still 2 different platforms is better than 4-5 in one brigade/regiment
(say, BTR for infantry + T72 for tanks + MT-LB for artillery and command vehicles + T-80 chassis of Msta-S + different special platforms for engeneering and AA vehicles. Not to mention two different truck types).
Any BMPTs that are built will be used
There is no decision to use BMPT yet
A typhoon unit MBT
There will be NO tanks other than on Armata platforms. Kurganets and Boomerang, having large-bore gun module, won't be MBTs, as they wont have it's level of protection. It will be just self-propelled artillery, so it won't be used on MBTs role.
the APCs wont be picked off leaving the MBTs to fight for themselves.
It's a matter of brigade's staff work to decide if a batallion tactical group need high firepower and protection provided by MBTs given to the BTG or a BTG need high mobility instead, leaving it only with lighter vehicles and keeping MBTs in reserve.
If you took normal MBT out of a brigade, even giving it 'light tanks', you will cut its combat self-sufficiency (the brigade won't be able to conduct many types of operations it's intended to). It will never happen! Not with MR brigades we are talking about. The Russian military already have VDV and Naval Infantry for lighter roles, MR brigades are supposed to be an all-purpose hammer units able to withstand and engage hostile heavy formations. Imagine what will be with a MR brigade, which only have 'typhoon MBTs' and is supposed to assault, say, positions of americal ABTC.
The firepower increase over previous units will be enormous
Lighter vehicles will suck to MBTs as if they even will have comparable firepower, they will loose because of lack of defence.
I have estimated on other threads and will repeat them here, that 20 percent of the Russian Armys new vehicles will be heavy tracked armatas, while I think 20 percent will be wheeled Typhoons and I think of the remaining 60 percent that 20 percent will be Kurganets tracked vehicles and 40% will be Boomerang.
Don't know that numbers you've used as the basis. Nowadays most of the MR brigades are equipped with tracked infantry vehicles (BMPs and MT-LBs) and 100% of them have MBTs. It's because of russian terrain in the first place, so you just can't switch to wheeled vehicles that easy.
Meaning a total of 60% of the new vehicles fielded will be wheeled because of lower procurement costs
Not sure about that) Boomerang is very complex.