I honestly don't think it would have made much difference. Perhaps the games would have been a little more competitive, but I don't think the W-L record would be that much different.
Williams was an okay player, particularly playing the passing lanes on defense, but he wasn't close to being a natural PG, and had a very limited outside shot. The only benefit there would be to give Bohannon a little more of a blow.
Connor at least has some natural PG skills. That allows the coaches to slide Bohannon over to the 2 and make him more of a sniper. Our offense benefits, but the defensive liabilities are still there.
A better question is where would we be if Fran had signed Glynn Watson or Tony Carr over the last few cycles?