[@Double] Usefulness would pertain in and out of combat since there are certain moves that are rendered pseudo-obsolete given the nature of the RP. Examples would be Anticipation, Mummy, Magician, and Healer to name a few. 

You're taking the name too literally for Poison Point. The ability may cause poisoning on physical contact, that's it. If you believe that it doesn't make sense, then pick Natural Cure instead. If you're questioning Natural Cure's mechanics on how it actually works, Leaf Guard is no better. Although we're trying to be realistic here, Pokemon is still a world that bends common sense. Budew is 8 inches tall; how would we explain it creating enough poison for sludge bomb? When I say realistic, think of how it is in the show. I'm not saying were going to copy it exactly, but that would give you an idea on what I mean.

If you're worried about its effects in terms of meta-battling, just remember that every action will have repercussions; some heavier than others. If abuse is done, rectification will definitely follow.

Regarding Energy Ball, I kinda corrected myself in my previous post.