I really liked olf Galio, but lets be honest, the only time I liked him was running him as support against an immobile botlane for easy flash r's, or against a dot midlaner with the old rune page system, so I could start level 1 with 105 mr and stack abyssals and banshees. New Galio feels like an actual champ instead of a cheesemaker, but his ult still feels really dumb for not really giving whomever he ults any kind of damage resistance/shield, resulting in most galio's only putting 1 point into it until significantly later as the cdr on e or w is more important than hey I can maybe help my jungler out after like 4 minutes of waiting if I don't get interrupted or fucked up during the chargeup on it.
Like yeah I like being a CC machine, but all the changes to the ult really just make me feel like they should just give him a new ult, or allow it to be like pantheons where he can just target but maybe at a shorter range, or maybe even a reverse kai-sa where you can ult enemies that have recently damaged a teammate/you. Anyone who has a passive/ult that requires a different person feels like a massive hindrance, Shen has the ability to be almost completely global but he also gives the shield on cast instead of arrival, Leona's passive is great in bot lane but means that she just loses out on that part of her kit if she tries to lane or jungle.
Possible changes are making it not unit targetable but ground, making it have more/less charge time based on distance traveled, making it self-castable, etc. As of right now the only time you really want him is a protect the kog comp vs divers, but even then you have to make it through lane against tahm/urg/illaoi/ranged, and relying on jungle help isn't really a viable option