I think the VW fights themselves are fun on COR. The reward system is wonky and it's very hard to progress in VW in PUG's. I'm still not past T2 Jeuno as every PUG I try to form or join never gets more than 10 people.
Given all I really want from the system is HMP and cruor, I'm not that excited about VW in general..
But you can be dedicated to COR but not dedicated to VW.
Agree that WF on Qilin is too weak. Last Stand is far better.
As for atmacites, I use coercion and slayer for the most part.