Spoilers.
I'll give credit to season two for avoiding the haremy feel of the latter half of season one. I'll also give credit for the fact that it tried, that it tried to be deeper, more realistic than the first season. Yet in the end, "Tensei Shitara Slime" is still a shounen show. The viewer knows that the MC will avoid defeat in every fight, and that the main side characters are nearly immortal. At least the fights are interesting and the interactions funny enough.
This season is confusing For a moment I thought the good guys that died would stay dead, that OP slime MC would finally be faced with an issue he couldn't overcome. Of course I was wrong. Yet while the viewer is asked to care about the lives of the main characters in an almost poignant mourning scene, not 10 minutes later we're expected to accept the deaths of twenty thousand humans (granted they were shown to be not good people, but still twenty thousand!) as a matter of fact and a equal sacrifice to bring back the MC's friends. To quote from the anime, "this kind of idealistic world can only be created by [the MC]."
So I guess the issue is that we have a heavy, bloody half coexisting with a light slice-of-life and it just feels... wrong. Don't misunderstand, it was entertaining for the most part. But it wasn't quality.
