Undead Unluck feels like it was made in a lab to appeal to Shonen Jump readers. But I think that in their attempt to find a new series to rival their biggest titles, they've failed to understand what made their most successful titles so good. As a result, new Jump series like Undead Unluck feel too manufactured. There's no heart in this show. It's uninspired. It feels like it's just checking off boxes in order to catch the attention of the magazine itself.
If this is your first time watching a Shonen Jump anime, you'll probably enjoy it. But if you've already watched Naruto, Bleach, or One Piece, then you'll easily be able to identify all the ways this show is trying to imitate them. Despite how hard it's trying to be unique, everything that occurs in this show is just... boring and unmemorable. I feel like I should say something positive about it, but I can't think of anything. Any time it comes close to doing something interesting, it still manages to do it in the most average way.
As others have already said, the "fanservice" in this show is disgusting. It regularly objectifies Fuuko for no good reason. I just felt bad for her, and I'm sure that's not what they were hoping I'd feel. There were a couple times where I did start to buy into the chemistry between Fuuko and Andy, but then it would get soured when I'd remember all the times Andy forcefully made moves on her. Andy IS a decent guy, so there's no reason for them to make him act that way towards her. Furthermore, it commits the worst sin that any fanservice can commit... It's just not sexy.
The character designs are ugly. Some of the characters look alright, but the two main characters are just unpleasant to look at. Fuuko's overall design would have been fine if it weren't for the art style. Meanwhile, everything about Andy's design is just terrible. Most of the time, he isn't wearing a shirt. For some reason, it makes him look so naked and gross to me... I don't feel that way about guys like Goku, but I want Andy to cover up BADLY. He looks better as Victor, if only because I hate Andy's regular slicked-back hairstyle so much.
For some reason, I kept thinking about Soul Eater while I was watching this. Soul Eater is a far superior show. If you're looking for quirky characters engaging in quirky battles with lots of action and STYLE, then watch Soul Eater. Don't waste your time with this like I did.