I like Corviknight's Hidden ability for the fact of free stat lowers
Shedninja was already pretty dead as most people have already one or two of it's weaknesses gaurenteed
Regigigas, slacking, archeops and more would be awesome to pair with it all three have good stats but piss pour abilities.
New items are kinda interesting, I found I never really liked trick room tatics so not overly enjoying the room service though the one that switches out at stats lowered is kinda jokes but cool in it's own way
Interesting ability, though can be a double edged sword if used wrong