Damn, hash rate on the official pool is only around 40Kh/s and sumo.ms-pool.net is over 1.7Mh/s - is that gonna cause any issues with the HF?
I don't know. What we much worry about is the block reorganization and high hashrate may cause it.
Hardfork, if working as designed, will just increase network difficulty to the true hashrate in a few blocks. It, by no means, can reduce the actual hashrate but you can hardly get much benefit to mine with too high hashrate.