'i like the changes' 'but i don't like the changes'
The mob health is fine, it means I get to play a rotation whilst levelling, it means we see more of the old dungeon boss mechanics - It feels like I am playing the game again, not spamming 1-2 abilities whilst watching Netflix.
Killing a basic mob certainly does not take too long if you are remotely aware how to utilize your class rotation, or possibly playing a healer (I don't play them, wouldn't know)
Named/Quest mobs have had a notable jump in HP, but frankly that is how it should be - Before you would likely kill the named mob without even noticing.