I think it should be some sort of factor. Like when looking at a potential individual matchup up, where ATH/REB are similar, a 6'11" PF may grab more boards than the opponents 6'7" PF.
Also i think height could be a big plus for zone defense. In real life, height doesn't necessarily equal length. But u think if the game implemented height as a factor, it would be safe to say that length would be involved. As in, the backcourt combo of two 6'6" guards in a 2-3, compared to two 6'2" guards (with skills being relatively equal) would have an impact defensively.