You do know that the height is cosmetic in this game right? I've seen short GK & DF perform well over the taller one. Not just slightly. But by a lot!
Err you've been in this forum since 2014. By now you should've seen that back then you cant score header from cross if you fight in league/cup/cl but in friendlies it's easy because the opponent is easy.
But now the live animation have seen a lot of goals scored from crosses(either header/tap in whatever). Much better from years before (after tons of complaints from us)