As far as Crewmen crewing LAVs goes... goes...
If you want to relegate our Infantry to Self Loading Cargo - "Spam in a can", by all means give us the turrets. BUT... The Russians got the BMP in 67, the Germans the Marder in 71, etc, every other adult army in the world gave it's infantry turrets, and, well, I always thought OUR grunts were pretty much smarter than any other grunts on the planet.
So... the problem would be?
The use of ground and understanding of mnvr is first inculcated in dismounted and then low level mounted ops. If you develop a generation of leaders who miss that crucial step, expect an argument of who exactly is qual to command cbt tms and btl gps.
Just my opinion. There are others. On one of LCol Stogran's tours of the perimeter in 2002, we had this same discussion. He replied that the higher lvl of mnvr at cbt tm, btl gp, and bde gp was actually EASIER to grasp than crew commanding and troop leading. He had a good a point there.
So, what do the Yanks, Brits, French, Germans, Chinese, and Russians do? And why?
How about the Isrealis?