Antoine Walker is a monster, and would be more of a monster with that shoe. I don't know what playbook you run, but
Quick 42 Flare is a very quick play that you call for a 3pt shooter. It's in the Hornets, Spurs and Hawks playbooks, among others. Your PF sets a screen for your wing, you pass to the PF and then to the wing in the post, and then your three point shooter comes off a screen up top and is wide open. There are a few scoring options in that play, but when I run it, the PF is wide open beyond the arc about 75% of the time, and when I was running Diamond Tom Chambers and Ruby Antoine Walker as my PF tandem, they both feasted on that play. If you give the shoe to Antoine, I'd look at adding that play to my arsenal if I were you. It's probably an easy 12+ points per game.
I also love the idea of MRR with that shoe. I run MRR as my backup, and I don't hesitate to shoot wide open corner 3s with him even with no shoe. I like his release, and he hits them more regularly than you would expect. With that shoe, he'd be very consistent there, and his mid range would be even better. He'd be basically a Diamond Gary Payton with height and a dunk package.
I love Fat as well. He got an Ammy today, and I'd rather go with MRR with that one anyway.