Honestly Sling looks like it's already on borrowed time, so it'll be nice for people that have it to be able to jump.
Dish Network and DirecTV's merger deal looks like it's not happening, which leaves Dish/Sling looking at possible bankruptcy again.
I don't want to shade TNA, I still enjoy their product, but their viewership is already low due to the channel they are on, so I don't imagine moving AEW/ROH to Thursday kills them even if it is head-to-head.