Wow. I guess I can toss out my impressions of what I've read (and watched) of the launch titles.
The Grimgar anime was ok, but like most single season anime, the story barely gets past the introductory phase. The light novels are better, but they are very first-person Haru.
Occultic;Nine is a weird story, and the anime seems to go beyond the translated volumes. It's not bad, but it's unusual.
Mixed Bathing in Another Dimension doesn't appear to have an anime, which is probably for the best. It's probably the most "adult" of the light novels I've read and I don't think it would adapt well. I do enjoy it and think that Mixed Bathing's Touya has his act together a lot more than Smartphone's Touya.
Last up is My Big Sister Lives in a Fantasy World. This light novel seems to have it all. Vampires, werewolves, turf wars, awkward high school romance, and it's still a better love story than Twilight. And to think I'm only on Volume 3!