The reasoning behind the War Axe nerf was dumb but I do think the fact that they nerfed it is fine. It's been a borderline problematic card for a very long time, and frankly it feels like it had to get hit eventually. It's obviously gonna hurt warriors a lot, but it'll probably be good in the long run.
I also disagree with saying the Spreading Plague nerf isn't gonna matter. Increasing the cost by one mana, in conjunction with nerfing Innervate which let you play it faster, means it probably comes down 1-2 turns later than it does now. Against any aggro deck worth its salt, giving them another turn or two to hit you in the face is a big deal. And I do think there will be perfectly viable aggro decks. I doubt Murlocadin will fully die, because while Warleader being hit matters a lot, Murlocs still have very powerful tools. Token Shaman, which can kill pretty fast as well, gets buffed by Spreading Plague being nerfed even with Hex costing more as well. People have taken Face Hunter to legend already, Zoo is a borderline viable deck, and the most powerful counter in the meta to those decks just got nerfed. Plus, Priest is probably going to become stronger now, and both Razakus and Big Priest struggle against aggro, the former because no Reno and lack of consistent early game+healing, the latter because it can't consistently do anything until like turn 6-7.
Also, in the case of Jade Druid, Razakus can already beat it fairly well. And, importantly, the Innervate nerf makes it harder for Druids to get out UI early, which is a very big deal because it gives you more time to get Skulking Geist down. In long control matchups, Geist is a game winner.
So tl;dr I think the War Axe nerf is a good idea but poorly reasoned, and the hits to Jade Druid matter.