So many moving parts it's hard to keep track of what's going on at this point. So many changes being made/ideas purposed. Production is still moving forward, but I'm hearing a wide variety of rumors from different people regarding the future of the movie. On top of everything else, things have been far more complicated ever since the mouse entered the house. (Not in any "official" capacity of course)
Whatever you may think about my bias against JB effecting my opinion of his cut, the simple fact that this thing has been "delayed" till August 2019 should give you a general idea of how well the culmination of his "genius vision" was recieved. Everyone involved breathed a sigh of relief when he was "removed".
I will say this though, JB is not solely responsible for this debacle. The execs that bought into his vision for the New Mutants, even after seeing raw footage, scripts, etc, and being repeatedly warned by certain people that this wasn't going to work, should also share the blame.