The Gibby Meta slows down the game
I've been watching a lot of ALGS recently and in my opinion Gibby needs a slight rework/nerf. His pick rate per team is probably about 95% so clearly teams value his kit. His ult is fine, but his q drastically slows down the pace of the game, causing many, many instances of teams just waiting out a Gibby shield. In addition Gibby being almost mandatory just reduces the overall team variety which makes the games more boring to watch. I know Valk is also heavily picked, but at least her best ability has some downsides to it such as the delay before launch, predictable trajectory during the first stage, etc. There is literally no downside to using Gibby's q beyond not having it available until cooldown is up.
There are a bunch of ways you could change the shield. You could give it a finite amount of health, you could make it opaque, you could remove is rez speed increase, make it like a ring so it doesn't protect from the top, make it like an umbrella so it only protects from the top, etc., etc. However it's done I'd like to see it changed so these games don't devolve into poke fests trying to bait out the Gibby q before the fighting begins.