Moving from shocker to cocker threads was the only thing that bothered me about moving from an ion to an ego!
It's funny, real steel barrels are typically easier to deal with.
Cocker threads are basically just terrible from a user friendliness perspective (I can only assume they make up for it in other ways?), and running BTs at a field was a nightmare when packing up
Twist lock would be amazing. A universal system that could allow all barrels to align correctly would make something like the ws66 hop up barrel practical without crazy secondary locking mechanisms.