Please riot, what did Zac do wrong?

Zac was the first champ I ever played, and I loved him from the very beginning. his playstyle, his personality, everything. He still is one of my all time favorites. I agree that he was too strong at the very beginning, but he got gutted so hard. I mean, every patch for the longest time after that had at least 1 zac nerf in it. Now, after all the tanks in the game were properly nerfed, zac remains unviable. here I will list everything I see as wrong with zac

his passive is like an aatrox passive, except 100 times weaker because his opponents have all the time in the world to destroy his crazy squishy bloblets. part of the problem with this half of the passive is that smite effects it, and there is now an aoe smite too! then for his other passive, it heals for a pathetically low amount considering the health cost on his abilities, they have a really short pickup range, they blend in with the terrain, and they fly between you and the nearest enemy champ so they will usually fly out incredibly far away where you will lose more hp trying to get them than you will gain.

his q has a pretty small slow with low base damage and meh scalings.

his w has too long a cd for a spam ability, and too little damage for a burst ability.

his e, while being a rather long range, has a short knock back for such an easily avoided ability. I mean, he charges for super long, then flies at you slowly for a short knock back. I know that it just got a duration buff in this patch, and I think that helped a lot, but it still annoys me how you are almost guaranteed to miss it unless you do it from a bush or elsewhere outside of vision. for the most part though, I think this ability is fine.

his ult. why does his ult need to have a long cooldown? it's a 1 second knock up. I could see it having such a long cooldown if each bounce knocked up or if it knocked up for longer, but its just a 1 sec knock up.

my suggestions for possible changes to make him viable again:

lower the time it takes him to revive from his passive. a lot. (could also potentially classify it as a heal so spirit visage effects it)

increase the heal on his bloblets and/or make them go between him and the nearest enemy (not champ) within a shorter range (making them closer to him than them would be nice)

lower the cooldown on his w by 1 second or make it's cooldown reduce to 3 s at lvl 5.

give his ult a MUCH shorter cooldown or make it knock back multiple times (I think that last one would probably be too strong)

could potentially give his abilities a longer range based on his max hp/size.

please leave any comments or notes, and please upvote. we want zac back.