Finished the main campaign and three expansion campaigns. The main campaign is really good, it improves pretty much everything on the first game, all the maps are fun and don't overextend themselves too much. Story is nothing to write about, but it works and gives you interesting opportunities, like betraying the side you have chosen earlier.

The expansion content is hit or miss, the maps feel a lot longer(and tedious) and way more chaotic, password mechanics are very buggy and you may get unlucky and have the enemy AI break the whole map by getting teleport at the start of the game, bypassing all doors. I was going to play all of the expansion campaigns but honestly it became too time consuming and tedious, but I admit there are interesting ideas thrown in there and some really (good) challenging maps. I may return and do the final one later.