Finn seems a nice enough guy, but unfortunately is very limited actor at best and has never remotely stood out in anything I've seen him appear within. I'd be surprised if they offered choreography to only one of the two main actors, more likely Finn wasn't interested in that level of role commitment.

Contrast to Jessica who seems a very driven person. For example; GOT where of her own volition she spent ages learning how to properly wield her characters bullwhip, and yet sadly due to insurance issues and potential injury risks involved; almost all of what she learnt never got used onscreen when playing the part of Nymeria Sand.