It's the priests. They NEED to be nerfed. I don't know if they made them heal a set amount by now instead of %-wise but this would be the best way to go. It makes health stacking even more ridiculous then it already is, as if it wasn't overpowered enough already. Not to mention lame.
Add the fact that Generals have much better survivability even without factoring in any minions.
Add the fact that dps stacking isn't viable in this game, so people have weak auto-attacks.
Add the fact that on top of health stacking, there exist blatantly overpowered items like Sigil of Vitality that let you cheat death in the cheapest, lamest, and most ridiculous way.
And what do you get? A fucking flag-cap fest with only like 3 deaths all game since everyone has 8k health, 60 health per second regen on top of priest healing, only does like 120 with AA due to no dps items, and just spam their abilities the instant they recharge.
The conclusion? Every single popular item that gives +health must be nerfed, some even obliterated (I'm talking heart of life treatment here). Priests must be nerfed. Overpowered helms like Scaled and Vlemish must be nerfed. Then maybe this game will be something close to balanced.