I think part of the reason is that there isn't really a lot to comment on at this point. At the moment it is just rumour and speculation. There is always a lot of that flying around for potential MCU projects and casting, etc, and while some of it pans out a lot of it doesn't. I don't think its that no one cares; I think its that they want more than "this actor MIGHT get cast in the MCU and if she does she MIGHT be playing Enchantress".