Despite the fact that Monte is leaving WotC it is not the end of the world for DnDNext. There are some solid designers/writers who are there. Bruce Cordell to name one. I wish Monte the best and hope what other projects he has cooking work out well for him. That being said, the sky is not falling just yet, mind you it may.....I just do not see if falling right this second.
Good luck to everyone involved in this and lets hope it quickly passes so we can what things everyone has brewing!