The GENFORCE-Mobile organizational chart got the then-still-in-development BTR-90‘s stats wrong. It’s both too light (at 17 metric tons compared to the 21 of the real one), and more importantly has too many dismounts (ten as opposed to seven I’ve seen in every real source). The real BTR-90 was cursed by coming right as the USSR fell, but in many ways it was also just a wheeled BMP-2, so its lack of entry into service is understandable.
But I thought (both for the All Union story and for my own fun) “Well, what if you could get a vehicle with ten dismounts?” The squad would grow to USMC size (two or three in the vehicle plus ten dismounts), and it presents a very tricky puzzle: Get a vehicle that is fit for a mobile corps (so it has to be viable in direct combat, both offensively and defensively), can carry ten dismounted troops as standard, and can’t be too big or heavy. If you want heavier weapons, it basically needs a remote uncrewed turret to not tip the scales. It’s not technologically impossible by a long short, but tradeoffs will have to be made.
Finally, the big squad means I can finally introduce my “eastern fireteam” concept I rejected for the next-gen BMP. Which makes more tactical sense, since doctrinally they’ll be fighting away from their vehicle more often, especially in rough terrain or as part of a tactical heliborne operation. So they need to be (theoretically) better in terms of both equipment and skill.
As for how it works, well, I’m writing right now a chapter where such a motorized rifle unit storms a Romanian town…