Taric's ult isn't visible enough for allies
Yeah, he's a little strong right now, but literally every game I play with him (admittedly at low level) my allies almost seem to start falling back in response to my ult. Does it look like a damage effect? Does it seem a bit too visually similar to abilities already in play (like his heal)? I don't know. But when I get a teamwide 2.5 invulnerability effect, I want my allies to know they're invulnerable, and the response universally seems to be to act as if they're in danger.
We could literally be winning a teamfight when I ult and they start falling back. It's ridiculous.