She had a larger portion of the Force in AvX then in Endsong and she was it's sole Avatar in Incredible Hercules. Cyclops also hosted the full force and he's not Omega. You don't have to be an Omega mutant to host the PF. You don't even have to be a mutant as proven by Thane or that Firefly.
Given that Greg Pak gave two explanations and Celeste could while yjr other Cuckoo's could not means Paks emotion explanation is correct.
No you're just being obtuse. It's correlates. Also Emma states she used to do that when she was younger. That implies she doesn't do that anymore because it's pointless. As she explains raw power isn't for the likes of us.
Avengers Academy 32. It's referring to Emma unless you want to be obtuse about that as well.