Braves BP arms ranked by xwOBA (min 100 PAs):
Matzek - .265
Minter - .268
Chavez - .272
Smith - .285
Jackson - .305
Martin - .306
Webb - .306
Santana - .313
I do wish Snit could get away from the dinosaur idea of a "closer", and would instead use the best guy based on platoon matchups in the higher leverage spots. Problem is, the Braves LHP BP arms are their best guys overall, and they don't really have a dominant RHP out of the BP.
Braves BP arms ranked by xwOBA vs RHH (min 50 PAs):
Chavez - .239
Matzek - .256
Minter - .286
Smith - .295
Martin - .300
Jackson - .306
Webb - .319
Santana - .330
So Matzek is a stud, and Chavez is showing some small-ish sample success vs RHH. I'm not convinced Chavez is some BP stud, though he may be very good vs RHH.
Smith may not be elite, but he is a decent option. He should pitch in about the 3rd or 4th highest leverage situation (which will end up being the 9th on some nights), and Snit should try to have him face primarily LHH where that slider is even more devastating. I wish AA didn't give him 3 years at premium dollars.