I agree. I think of League lore as fundamentally kind of lighthearted, or at least a bit on the cartoony side. Lately, Riot's been doing too much uber-serious grimdark stuff. And sure, serious stories can work just fine! But it's hard to escape the underlying reality that League's a pretty derpy setting, with a crazy mixture of fantasy/sci-fi cliches all thrown in together. That's not an insult. Far from it; I think it's a lot of fun.
Still, for example, I definitely preferred "YAR HAR HAR SHIVER ME TIMBERS!" Gangplank to the current version. When I saw Riot say something like, "We wanted him to be more like a REAL pirate than a silly stereotype", I was thinking, "wait, what? A real pirate? Are you sure that's what you want to go for here? In your video game with dragons and yordles and cupcake traps, you want to seriously address the issue of piracy?"
To their credit, I think they mostly made the new Gangplank work. But like OP, I'm happy to see that they're mixing in some un-selfconscious silliness. It's part of what makes League League.