I would definitely be a fan of Mbuemo - he'd be an upgrade on the type of player we have in Trossard and Jesus. When we were linked with Cunha, I thought it would make more sense to go after Mbuemo because at least he can play more of a traditional winger in addition to the tweener role that Jesus and Trossard can play. He's a good finisher with solid but not game breaking speed that would definitely add some competence to our attack.
Personally, I'd love to see if Bournemouth would be willing to part with Semenyo this window at an above market price (over 50m) because I think he would be perfect for our project as an ambipedal winger who can take on his marker, has a great shot with a very short backlift and has the height and dwelling ability that Arteta loves. I'd understand if Bournemouth doesn't want to sell him now but he would be my choice right now. Ideally, we could also bring in Gittens in the summer and push out Trossard so our winger rotation would be Saka, Semenyo, Gittens, Martinelli. Subbing in Mbuemo for Semenyo wouldn't be the worst thing either.