True in its strictest form. However, I think that to add platoon commands would still be a more than welcome addition to the game, particularly for Real-Time play, taking we don't eliminate squad level commands. Also, don't forget that the IFV/AFVs would have to be counted as separate, but linked, units from the infantry platoons.
Gotta think that in 2009 when the CMx2:EF comes out, PCs will be powerfull enough to handle scenarios with reinforced battalion on each side. Try to handle that in RT...
So IMO, a platoon level command system would be useful and would not deter from the fun factor one bit. As would be an attach/detach function actually.