I haven't heard about any changes. Right now the MIS can carry 6(?) S3s and 12 S2s on the wings with 1 or 2 20-S2 racks in the hold which will be able to feed the wing launchers.
Carrying 10 or 20 reloadable S3s would be awesome from my point of view, but that would be so bigly OP I doubt it...