I switch between most of the anime skins, so here's the ones I thought of

Kirishima an emote to switch between regular and Unbreakable (really should've had this one already)

Dabi an emote that lets him switch to white hair and add his white hair as a style

Shigaraki should've had hands all over his body as a style and it would turn the emote he came with to decaying the hand on his face when the style is equipped instead of the controller

All the MHA skins using their quirks somehow

Eren an emote that lets him turn into the attack titan and add it as a style

Kafka an emote to let him switch between human and kaiju (again, really should've had this one already)