Started playing on a whim a week-ish back, wondering if anybody else has given it a shot. I'm not too far in, only through the first two story chapters, but I like it so far.
It's actually got a pretty good amount of story, with some actual cutscenes, and a few CGs as well. English voices, and the art style is pretty cool. There are even little cutscenes for each of the character's strongest attack.
It uses a CE-like system, and the battle system as a whole reminds me of FGO more than any other mobile game I've played, though there are a number of differences.
It also occasionally has peaceful story segments where you explore without having to worry about battles, and you can go through large areas and meet various NPCs. It's nice to know not everything has to lead to combat.
There's an event going on right now that seems to have a proper story to it, as well. Hopefully that means there won't be a shortage of story stuff moving forward.
No idea about the longevity or the meta, and I haven't been giving it as much time as I probably should, but I think I might stick with this one as a secondary game longterm.
Oh, it also has a neat feature where, after clearing the first entire story section, you get a free ten roll. Except, after you roll and see what you get there, you can reroll up to thirty times in-game, until you find a result you like. I managed to get some pretty decent stuff with almost no effort. You also get a free single summon every day. There's just a certain 3* I haven't been able to get yet, and it makes me sad~