If you mean his ms powers, i'm not completely sure itachi gave them to him, i think he awoke them due to grief. he's still be pretty strong without them though, and smarter than he is now as he wouldnt be able to spam susanoo and the other ms techniques. he would be a good jounin level without oro's powers or ms imo, he uses the sharingan very well, has good kinjutsu and good lighting techniques, plus good speed and strength.
if you mean without itachi's eyes, he would be blind by now, and probably still blundering around tobi's cave.