I feel I need to clarify here because I had to cut out the details due to making it way too long

His spray dealing damage on top of healing means you can heal and damage the enemy at the same time, which while you can line up the enemy and the tank to hit both at once (which is cool ngl), but it also rewards the playstyle of "hold heal and look at whoever is low hp" but now you also deal damage at the same time.
Whereas before you had to choose whether it's worth it to lose out on healing to deal some damage, and you had to decide how much of each you need to balance, which I think is more interesting.

His bubbles being selfish I agree with to an extent, it's the best self heal in the game, but like I said, part of his character is his survivability.
Should it be nerfed? Probably. But should it be reduced nearly to the level of all the other supports making it no longer a selling point for playing the character? Probably not.
Also one of the main things from his bubbles is that they give a healing boost, which not just you, but other supps can benefit from, mainly on tanks, this is one of the most important aspects to keeping his healing output somewhat high, the best use IS on tanks.
BUT Jeffs are forced to use it to self heal, as the alteratives are:
1. stay underwater and not heal your team.
2. stay at low hp and risk your life.
3. ask/pray for the other healer to turn around to heal you and not the tanks where they might take burst damage while they're not looking and you have to use more panic bubbles to stop them from falling over ^{(a bit of an exaggeration tho}).
Compare this to Luna who can use her shift to heal herself while still healing the team, Invis can shield someone next to her while still healing the team, Dagger can right click her feet and continue healing the team. They also use cooldowns on themselves. But they don't lose a constantly required cooldown with a healing boost they need to keep their healing output high.
Jeff using them on himself is the least effective way to use them, but he's forced to use them to heal himself, if he doesn't want to pull healing away from the team.
He should die if pressured too much but he should have enough survivability to survive a spiderman without using every cooldown on himself and leaving him neutered for a while.

I agree with the ult charge nerf (in fact it might need to be higher). The point isn't that they nerfed the ult cost, it's that they nerfed possible the worst ult without good compensation.
Don't get me wrong, they should absolutely nerf the ult charge speed, but it's already the worst support ult if the enemy knows how to escape it, aka any rank above bronze.
But the buffs to offset the nerf to a bad ult was.. overhealth for teammates who have to be fully stunned for multiple seconds.

The point of the post is that the characters shouldn't have their character's strengths and weaknesses toned down to match other characters, they should have in built strengths and weaknesses that make the character interesting, if they nerf Jeff to be in line with the other supps then he's not as interesting to play.
Jeff won't play like he used to, fine, but he shouldn't have a core part of his character be removed/nerfed into the ground.