I apologize for the off-topic comment. But in Heroes Online, there will only be 2 Factions: Humans and Necromancer (at least initially).

That's exactly it – only initially. I read in a blog about further plans to introduce new Factions.

It's the opposite for me.
I got into it.
Initially, I completed all the Campaigns on easy mode, and now I'm starting to replay them on hard mode, while also changing the heroes (instead of a warrior, I'm playing a mage, instead of tears, I'm leveling up blood, and vice versa).
Plus, there's new dynasty weapons.
So, I'm happy with the expansion; I'm currently playing through it.

I don't like this game: the mechanics for resurrecting units are too simple and accessible; the ability to hire creatures from all cities in one location; the ease of converting buildings; the simplified city building system; the reduced number of resources, which has weakened the game's management aspect due to its flawed implementation; the relative weakness of skilled warriors compared to the main ones. The skill system is a debatable point. On the one hand, you are your own master. On the other hand, it's somehow a bit boring. None of the above has been changed by the expansion, so I'm out.