When it gets to the second half, Fran generally goes to the bench with 12-13 minutes left (okay, fine). What happens is that if during that time the team is playing well Fran pretty much makes the decision that Ulis and CMac are just going to finish the game out. Period. It doesn't really make sense to me, but it seems to be his thinking. My main issue with it is that the only guy who is anywhere used to playing 13 straight minutes of effective basketball is Keegan Murray. There's nothing wrong with subbing out Ulis at the 6 or 5-minute mark, get him a quick rest and putting him back in if Fran really thinks he's playing better that night. Rather than the kind fo first unit/second unit thinking that Fran seems to go with, I would prefer to see more mixing and matching. Fine, take Toussaint out at the 13 minute mark of the first half. Put him back in at 9 or 10 minutes, leave Ulis in the game and have them play together. That was forced to some extent by the foul trouble last night.
In terms of who is more effective, both Ulis and Toussaint have their strengths but neither has really shown they deserve to be getting 30+ minutes a game. Having them split time seems to be about getting the most out of them.