I wouldn't say nothing but what often happens with preferring nerfs to buffing lower characters is nikkas wanna blow the character's knees offJP isn't playing the same game as the rest of the roster. It's really, REALLY bad. I'm surprised anyone could think nothing needs to be done at all.
The changes I suggested definitely make the low tiers have more fun.
JP's zoning is good, but overrated. The game has no chip damage and parry, and you can drive rush when he does certain moves to gain better position. Now if you're in burnout JP's zoning is but JPs real terror is the mid to close range
If I had to make changes to JP I'd probably only just extend the hurtboxes on his cane moves, mostly sweep. Capcom is allergic to giving hurtboxes to weapons so it tends to cause problems. Make his normals easier to whiff punish(like the rest of the cast has to deal with) and most of the problems will be solved