Braves actually finished at .305 last year. .317 would have lead the non-Rockies MLB last year, but there is usually 2-5 teams in the .31x range.
For what it is worth (prolly not much) the Braves regulars with 100 PA that had BABIP under .305 last season were:
Matt Adams .294
Dansby .292
J. Peterson .279
Suzuki .268
A. Garcia .247
D. Santana .243
R. Ruiz .231
This year the guys who are dragging the average in the SSS are:
Markakis .304
Albies .298
Suzuki .262
Lane Adams .298
C. Steward .214
C. Perez .200
Culberson .188
Bourjous .167
.......
Nothing necessarily to draw from that except Suzuki is pretty consistent and the Braves better players seem to either have BABIP skill or continuing good fortune.
I fully expect Albies to be up in the .320 range when he stops hitting so many FBs.
The rest of the low BABIP guys won’t see many more PAs.
All the high BABIP will likely regress, quite a bit in some cases.