I agree somewhat, but honestly I could deal with the hp pools so long as their was adequate rewards as almost everybody states. Coming from the side of a player, it does feel boring, but at the same time if you look at the bigger picture from a developer’s perspective it makes sense as was previously stated the longer the fights get dragged out the more consistent you have to be.
The idea of mixing in different templates I think was actually implemented in Diablo 3 with their elite packs. They have certain skills/properties(increased speed,reflect damage, etc) that elites could have on top of the increased attack/def/health pools. In that game it too after a while seemed repetitive(but there’s also much less content there), but you face a lot more elite packs din Diablo 3 than you would be able to fight dungeon bosses in GW2 so it may work better in this game.