My Personal View / Solution on the Subject :
Vehicle >>
DRDO modified BMP-2 for different purpose, This Vehicle may look like BMP-2 but it is not, Its Longer 7 wheel and Wider than BMP-2, The Crew compartment is larger and most importantly there is space in Crew both in height and length..
Modifications :
1. Wider Tracks with New Wheels ..
2. Powerful engine and Propeller for Amphibious ops ..
3. Vehicle height should be equal to overall roof ..
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Turret >>
RAFAEL's Samson Family of modular remote controlled weapon stations
Most of the Equipment is outside and very little controls are Inside, This will save space and more for Troopers..
In this Config it may carry more than 10 troopers..
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Just my view ..