Updating the wallet only 1-2 days before the hard fork will happen is guaranteed to have some consequences as people and services will miss to update. It's even worse if you don't announce it where it is visible to most people (Twitter, wallet alert feature) Not everyone checks the forum daily. Has Noir Group notified all the big exchanges yet? Cryptsy, poloniex and btc38?

Regarding the pool, ypool.net will switch all NRS workers to PTS at block 50000. After that no more NRS mining will be possible but funds can still be withdrawn.