Is Riot trying too hard to make the few armor-based tanks in the game OP?

Taric can be a pretty good counter to an armor-based tank. Granted, he doesn't reduce their armor by a percentage, but the armor he does reduce really cuts into their damage. But, he's getting remade and not only will he not provide bonus AP and AD in an area upon activation, but also will lose his armor shred. Meaning two significant abilities used to combat the tanks will go out the window.

To me, the Taric changes seem like a nerf, but I guess it's a buff against a heavy aoe Mage like Katarina. Of course, he could already stun her to take her out of her ultimate, so I'm not sure why he needs to be 'stronger' against her for example.

Meanwhile, Kayle is getting her percentage armor shred removed in the PBE...?

So now you can't even pick Kayle against Rammus/Malphite? Are tanks really so weak that you have to wreck the supports? I thought tanks are a bit overpowered if you ask me. I rarely lose with Rammus or Malphite. Honestly, they are a little boring with how strong they are. Why make them even stronger by removing their counters?

If you think a champion like Zac is underperforming as a tank, has it ever occurred to you that he is actually not a tank, but a mage? His AP ratios are pretty darn good. Why don't you make his spells scale with MR and armor instead of with AP? Then he'd be a tank! Right now, that stuff just benefits his basic ability, which isn't a reliable stat sink if you ask me since it has a huge cooldown and even if you live through it, you'll probably die immediately anyway. So I don't get what the point of his basic is anyway. I think even if you switch the damage scaling on all his abilities to defense stuff his basic would still need a buff.

And I don't think Zac is the only champ like this that isn't a real tank. Looking at Cho'gath(support), Blitzcrank(assassin), and Alistar(fighter). So are these the tanks that are 'too weak' and you're trying to make them stronger? So by removing counters to the tanks, you're making the actual tanks like Rammus and Malphite more and more powerful, don't you realize this? Why not just put forth the effort to fix the 'weak tanks' and make them real tanks instead of like this Zac for example that is a mage and not a tank.