Not a fan of the new GP rework, I don't think he'll be any better.
Honestly for all intents and purposes, his kit is mostly the same. I think a big problem with GP before was his early gameplay pattern and that hasn't really changed. E sounds like a huge gimmick and I really dislike that you have to play a minigame with your opponent to even get the spell effect, its basically less reliable than your old E so he's actually seeing a REDUCTION in overall continuous power in favor of... well... that gimmick. Plus if you want to proc it from range you have to blow your Q, meaning its not even really a trading tool because you're just swapping one button for another.
His passive got better I guess. His ult functionally is still the same, not that his ult was ever bad. I just don't see these changes pushing him in the right direction to really be competitive.
Not to mention aesthetically he lost a lot of his charm in favor of making him look like a dumb brute. He looks like the heavy from TF2 stuffed into a pirate costume. Really not a fan of this rework visually or gameplay wise.
What I would have done with his E is just put it on a timer when he places it and have it so he can speed up the detonation by shooting it or meleeing it with his passive, and not let the enemy interact with it at all. I feel like competitive players aren't going to like him because of opponents having as much control over his E as him, and in competitive play you need reliability and not gimmicks.

You're welcome.