So what changes to the core mechanics would you like to see in XY?

I'd like to see the entry hazard system revamped.

>entry hazards other than spikes destroy themselves after triggering once
>laying multiple layers of hazards extends their lenght instead of increasing power
>new ability that clears hazards harmlessly upon switching in
>new entry hazards with multiple effects (levitate negation, entry ability blocking, PP drain?, raw untyped damage)

Also some changes to weakness/resistances to make some of the less used types more viable.