Although a lot of people disagree with the Sage changes in patch 5.12, I personally think they are good ones. Yes, I agree that they nerfed the self-heal a little too much. Maybe they could've changed it to 40 or something. But when you look at it, Sage is more of a supportive character in the game, and I'm surprised she even HAS a self-heal in the first place. They buffed the ally heal to literally full health, so win-win I guess.
The wall nerfs aren't THAT bad. Like let's be real, whenever we see a Sage wall go up we shoot it instantly anyways. So increasing the fortify time by 0.3 seconds won't do much.