What if we changed Tarics Ultimate to something... unique? No more StatBotTaric!!!!!

Taric needs a slight lovetap (even though hes been reworked 3 times in a year). ANd I think the place to do it is his ultimate.

Currently it does: Taric slams his hammer into the ground to deal damage to nearby enemies. For a time after, Taric's gems radiate energy, empowering Taric and his allies with bonus Attack Damage and Ability Power. Taric slams his hammer into the ground, dealing 150/250/350 (+50% Ability Power) magic damage to nearby enemies.For the next 10 seconds, Taric's gems radiate energy, granting him 30/50/70 Attack Damage and Ability Power and his nearby allies half of the bonuses.

What I propose: Taric slams his hammer into the ground to deal damage to nearby enemies. In addition his gems become truly outrageous blinding and slowing enemies near him or entering a space around him for 1 sec, and reducing the damage they deal by 20/35/50% Aura lasts Y seconds and dmg debuff lasts 2 seconds

Why this change? Teamfights are where taric truly starts to fail, but his kit (including W) should be made viable to work as a protector, specifically as the support you choose when the enemy team is full of AD assassins that want to dive in.

Basically I want Taric to be able to be so fabulous that enemy assassins can't get past him to his carries, but in a slightly unique and champion themed way. Granting AD doesn't really that the Gem Protector theme and seems a little weird since he personally gets almost no benefit from AD (he needs AS for his passive and all his abilities scale off AP).