I agree 100%, Barea helped Ben's stock. If you can drive and dish, and shoot the J, size at that position isn't as important.
Ben actually has good size for a PG at 6'2" to 6'4".... the problem is that he isn't super quick, can't elevate, isn't an elite passer and isn't a great ball handler either. He has a good all-around skill set but no really 'elite' characteristics as a PG and is probably too small to play SG.
The best thing he has going for him is that he can play defense on (most) NBA PGs pretty effectively (as demonstrated in his ability to battle with Kemba Walker and win), he is competitive enough to improve his game, he is a good kid (read: very low probability of legal troubles or being a "black eye" for the franchise) and he has NBA range on his 3.
I think he can make a roster and possibly even become a good rotation player. But I think he could absolutely dominate abroad where there isn't the hyper-athleticism to deal with.