Gangplank can't be allowed to continue existing in his current state.
He has a 100% pick/ban rate pretty much everywhere, from Bronze up to fucking Worlds, and it's easy to see why. In his current state, he's objectively unbeatable unless the person playing him is completely braindead. Aside from having a blink and being resourceless, he can do everything a champ in League can do. He has true damage, high magic damage, high physical damage, burst, sustained, aoe, single-target, both ranged and melee, a powerful self-MS boost, a passive gold-gain mechanic, the ability to spellblade crit an entire lane while ignoring 50% armor and applying a slow, the largest self-heal in the game that also cleanses for some fucking reason , and a global ult that not only upgrades thru level like other ults, but can also buy upgrades in the shop making scale stupidly hard.
He bullies lane against anyone who isn't ranged, and then scales up into infinity. There's no point in the game where he's weak, there's no part of the game he isn't incredibly strong at. He dominates laning, objective control, sieging, counter-sieging, teamfighting, dueling, splitpushing, he's insanely powerful at everything. How can this champ still be allowed to exist?