User blog comment:LegendSpartan1/Zac Rework/@comment-24852115-20150105160133

Eh... I agree that Zac doesn't show up as often as he should, but it's not a problem with him in particular. Tanks in general have just kind of fallen by the wayside recently as fighters get more and more popular, crowding out the beefier options. Zac's kit is fine as-is; honestly, the only change I would consider making is making his bloblets' healing scale with his level, much like Garen's passive. As for your ideas, let's see...

If his Q did pull targets, it would have to do a LOT less damage and have a longer cooldown to compensate. This would seriously hurt him in the long run, and he doesn't even need a pull in the first place; he's already got a long-distance knockup, a close range knockup with a speed boost that hits several times, a slow, and good synergy with Rylai's.

So, you basically want to see Rammus's W on him? Don't think that'd work too well here. Most tanks are designed to deal consistent damage with one of their skills by staying in the middle of the enemy team, with Galio and Shen being notable exceptions. This is Zac's main damage button, as well as his biggest source of bloblets. Turning it into a free stats button just removes his interactivity, his DPS, and most importantly his sustain. Zac is a sustain-based tank, much like Dr. Mundo. Adding in defensive steroids would just recreate Garen's toxicity.

The E is fine as-is, being a long-distance hard engage. Adding damage to it when he's already got plenty of other damage sources seems excessive.

I agree with the ult change, though; it does feel kinda tiny, even with the speed boost it gives him.

I already mentioned the change I would give to his passive, but keep in mind that his abilities cost 4% current health, while the bloblets restore 4% maximum health. If he's below max health at ALL, his bloblets heal more than they cost to create, expecially since landing his E on multiple champs makes multiple bloblets.

tl;dr Zac could maybe stand a few small buffs here and there, but the problem's not with him, it's with tanks in general.