I'm finding the framing of Disney's plans almost exclusively through the lens of Epic Universe very reductive. It seems if they do anything, they're petrified about the impact of Epic Universe. If they don't, Disney is paralysed by arrogance, fear, incompetence, or something else as they watch the existential threat of Epic Universe draw ever-closer.
Personally, I suspect Disney's bigger concern in the immediate term is addressing the impacts of their own actions or lack thereof rather than responding to Universal. In particular, they need to combat the lack of capacity that has resulted from under-building, making the park experience so dependent on planning and apps such that it is less intuitive and relaxing, and the growing narrative that a Disney vacation is not just too complicated but too crowded and expensive.
I'm not saying Disney is not at all concerned about the impact Epic Universe could have on attendance, I just suspect they are not nearly as concerned as many on here are imagining. A bigger concern for Disney is consumer sentiment turning against them.