Anybody can at any time create a hard fork of any open-source cryptocurrency, and nobody's consent is needed. All it takes is some programming knowledge.

BitCoinCash (Or BitCoincasH? Don't confuse with BitConneCt, the scam coin) has some good ideas, mainly the increase of the block size, but would have been more useful as a replacement of bitcoin, which would require consensus of a majority of the BitCoin community.