The problem is that Mulcahy/McConnell are really designed to occupy the same role. Grit guy, scrapper, facilitator, ball protector, rebounder, fighting for loose balls, "do things that don't show up in the box score", occasional offense as a 4th option, etc. It's the sort of guy a lot of successful teams have on the court.
The only issue is we have two of them on the court at the same time for like 75% of the game. And if the other 3 guys out there with them aren't "on" offensively, we can get in trouble fast. You can only get assists if the other guy hits his shot.