Late to the party, but my 2 ct. are that I don't feel that mandatory combat in Cyseal is necessary.
As has been stated, there's always the possibility to leave the town, several quests point you to locations outside of town and there's plenty of combat to be had there.
Anyway, if there's a good reason for a combat encounter in Cyseal I'm not necessarily against it, I just don't think it's really necessary.
