I like Saric. I also like Mikal Bridges. He was a 3+D player in college (43.5% from 3 during his junior year in 6 attempts per game). Hasn't lived up to his reputation at the NBA level (33.2% from 3 since he got drafted), but I bet he can figure it out in the future.
Highly doubt that the Suns would do Poirier + the Bucks pick for Saric. Chances are that they wouldn't do it for Bridges either, but stranger things have happened.
The C's could have a use for a backup SG who can play off the ball next to Smart. Bridges fits the bill for me. Not to mention, he can provide cover at the SF position as well. Him and Semi would be a promising 3+D duo coming off the bench. Imagine the defensive potential of the second unit with Smart-Bridges-Semi- G. Williams switching every ball screen. I reckon it would be fun to watch, given that we also have Kanter coming off the bench who can score pretty much at will against backup centers.