Id say highly unlikely, the hardware design has proven successful, the only known issue, is the one we knew before release, is the TRS output (which is easy to 'workaround') ... so perhaps a tiny hardware revision to address this.
so really I don't see any need to revise the board, even if he had time which I highly doubt.
why no general released yet?, well Id suggest perhaps two reasons:
the main one is Johannes is one man... shipping/supporting the initial release has been huge (easy to forget this due to the level of professionalism),
the second, I personally would wait after the initial release, to just check that with a large number of 'out there' there continues to be no issues.
of course it may also be, he just wants a bit of a break, after the stress and strain of shipping all the boards, I think I would
anyway just my thoughts...
@MacroMachines very nice vids, Id like to see more too... I keep thinking about diving into the eurorack pit, fortunately Axoloti has managed to quell that for a little longer.