User blog comment:Master Sima Yi/Assassinews 12-05-'15 — Assassin's Creed: Syndicate has been revealed!/@comment-24849873-20150513075711/@comment-4950493-20150513084836

I think I remember in the livestream one of the developers say they were going for a brawl-style combat system to suit the gang warfare element of the game which might explain why the combat seems more rough around the edges than Unity's.