hamletsmage

Divine Gate is based on an app game by GungHo, which boasts about having over 1000 characters. This leads to the problem of which characters to animate, since the favorites would change from player to player. So, instead of choosing a handful and giving them all the air time, Studio Pierrot chose a couple dozen and made a mess. 

Story: The first half of the anime actually had a comprehensible storyline. Got to open that Divine Gate! And then, a lot of questions pop up without a whole lot of answers. But when the game the anime derived from a connect-four style puzzle game, the story wasn't that strong to begin with. Still, the storyline is way better than some app-game anime.... (vampire Holmes)

Animation: The animation is colored in a way that reminds me a dystopia. I think it's the thicker lines and stark color contrasts. The movement and elemental attacks are decently animates, as well. There are some times were the fluidity just isn't there, but nothing that shouts "bad animators".

sound: I didn't watch the OP or ED, since I marathoned this anime, but I do know the OST seemed to fit well with animation.

Characters: Here's the major hang up in this anime. There are only 3 characters with any sort of backstory, and it's jumbled at best. The rest of the characters all have varying levels of importance, and there are so many of them trying to get air time that it just becomes character soup. There's the Knights, the students, some cross-world plot points, some Norse gods without names... And Shakespeare is a little girl? But when your character base is over 1000, and everyone has a different favorite starting Pokemon...er... Person, it gets a little crowded. 

Overall: Maybe play the game for a bit, get to know the characters, then watch the anime. Maybe it will make more sense that way.