This trend has been around a while. Each and every quest has become just a massive slaughter of mobs, every 2 steps there is an encounter with lots of mobs. At some point, killing mobs in this game has become the most boring thing to do.
I've tried the two new quests yesterday and they are no exception to this rule. The quests themselves were really nice and I liked them so props there but after killing 100 or so mobs in first few corridors, I just found myself bored to death and HAD to use invisibility because otherwise I could not have finished the quests without falling asleep. This issue is specially true at higher levels (LE and EE), where the HP of mobs is not balanced at decent levels and it takes a while to clear an encounter. Killing 300+ mobs in every quest is not fun. Killing 300+ mobs with 20k+ HP each is even less fun.
And really, kobolds again? Because you absolutely read and listened our complains about kobolds in the previous two updates. Not just that, now there are MILLIONS of kobolds that do 17k points of damage with Fire Burst.
Balance the HP mobs and rework on the number of encounters in the new quests.