No, the Ivern buffs are not enough.

This meta is almost entirely dominated by early game jungle pressure. Pre 15 minute jungle ganks decide most games at both the casual -and- pro level.

So sure, Ivern is a bit stronger now, but his ganking patterns are still some of the worst in the game. His root skill-shot is incredibly slow while being short in range, and it is his sole source of engage. Unlike other relatively slow shot-range skill-shots, the payoff that Ivern gets for landing his root is incredibly low. Elise, for example, gets a full stun for 1.5 seconds, not to mention her rappel ability offers her a much easier time landing this, as it allows her to get in close.

Sure it can allow a thresh or Leona to dash on top of the enemy, but in a lane without a hard engage tank it can get the lane you are ganking for killed as easily as the person you are ganking. Especially considering it is really easy to take the root's dash on accident with mages casting targeted spells, and marksmen dont have a choice. There is nothing quite like watching your Viktor top take the root into Darius's grab.

Ivern needs more early game tools. Sure his clear is relatively quick, but there is a massive difference between a Ivern coming out of the brush level 4 and a jax, xin zou, or graves coming out of the brush at level 4. His kit was designed to farm up to the mid-game and buff a hyper carry. None of the hyper carries are meta right now and since Riot has spent most of this season gutting the support class like a freshly killed cow with nerf after nerf, even if the hyper carries WERE in the meta, Ivern would still be falling short.

Make his Q a stun, or make it faster. Give it a longer range. Give his E a longer cast range and a shorter duration if you have to. Have a unique interaction with Ivern's Q so that Daisy either pops out faster, or knocks-up as she pops out in order to give him a combo. Because as it stands the Q R E combo is extremely lackluster in terms of crowd control. Ivern relied pretty heavily on windspeakers blessing before the run rework and as it stands the only keystone that fits him is aery which has been nerfed into oblivion (Because Riot really hates support players).

Ivern's problem isn't how much damage he's doing. Its his lack of real utility, especially when his team is behind.