Gangplank is still completely cancerous to play against
Cmon man, the champ effectively has no counterplay once he gets his sheen. "Weak early game?" Nope. Goes corrupting potion and pops an orange, suddenly went from 10% health to 80%. GP mains love to point out his "weak" early, but the truth is that he has the same problem as Jax - he simply scales far too quickly. At half an item he can already nearly oneshot waves and block the entire lane with his barrels. There is no retaliating against this champ as he'll either: 1. Kite you to death; 2. Outdamage you thanks to his sheen; 3. Heal back up for free.
He's poor design and ought to be reworked. His cowardly playstyle isn't a good thematic - it's absolutely cancerous and anti-fun to play against. Here you have a late game-oriented champion who has built-in mechanics to eliminate that supposedly weak early.