Yeah but don't forget that, now, he can negate ALL damage from ALL sources at the same time!
Before, even if he could block 3 turrets shots, that's it! That's all he could do at the time. He either blocked the turret shots and got damaged by AAs and spells, or he blocked AAs and took damage from turrets and spells. And that was pretty good on its own and it was a huge part of why he was so oppressive in lane.
NOW, he can block turret damage AND AAs AND spells, including True damage! Yes, there is a directional limitation included (only blocks damage from the direction he's facing) but still, being able to be immune to all sources of damage for 1.5 sec (increased to 2.5 sec if empowered by new passive), on a such overall short CD (20-ish sec), is pretty OP, imho.
Like, besides
, who has a 0.75 sec CC an debuff immunity with her W, Pantheon is the only other champion that will have an immunity on a non-ultimate ability. Better yet, He's gonna have the longest immunity spell, for a non-ultimate ability, of all the champs, which is crazy!
And I'm sure the directional limitation of it will be easily bypassed if Pantheon mains figure out how to play him correctly, so... yeah!
[zombie-brand-clap]