Basketball players don't rebound, defend or shoot with the top of their heads. Height is really a very overrated measure.
Standing reach is much more important. If you check Bealeys's standing reach, 9-11, you'll see that it's comparable to those of a lot of big men in the league: one inch shorter than Stoudemire or Tyrus Thomas; 1/2 inch taller than Noah and exactly the same reach of Horford, who both play center. And he can jump, he's quick and has strenght.
Rose (measured 6' 2.5" with shoes, so he'll be listed as a 6'3" in the league) is as tall or taller than any other elite pg in the league not called Jason Kidd or Billups, very athletic and with a good wingspan, so I can't see these measures affecting his stock.