First of all guys I'm impressed with your work, congrats

My personal suggestion after several coins launches, is to avoid a second fork. To the eyes of the unexperienced users it sounds always like something painful and dangerous, in particular when PoS involved (where are my old coins? will they still be valid? my old/new wallet does not sync/work etc). Usually it's also not really welcome by any exchange (and in this moment you should really work hard to get definitive wallets ready for exchanges before everything else).

So if not in time for first release I'd suggest that a delay is better than two hard forks, otherwise if you can avoid two of them then it's fine to do a first release without Groestl. In that case the negative side will be the PR, because is among the main features (with PoS and new reward) pushed for new DMD, so anyway a delay of few days would be preferable imho.

@asplinux