I'm not really all that passionate about this topic; but i can get behind reducing the HP to be in line with the MM and just adding more mobs for the simple fact that killing a gobo in a single blow does feel great and killing large groups of enemies quickly does make you feel a little more like a hero
And it significantly extends the waiting time for the next turn. Remember that this is a turn-based game, in the old games you could have thrown armies of goblins on the player and the fight was fast anyway. In the case of a turn-based game, you are unable to do it.
Maybe the goblins are a bit stronger, but at the same time you can have fewer goblins on the battlefield