Yeah, that was a pretty decent finale for the show, all things considered. It pretty much wrapped up all plot threads for the season while setting up new ones for a season that won't materialize (Two-Face, Henri Ducard training Turner, MAYBE Cluemaster). Even the little joke subplot with Cullen disguising himself as a cop had a surprisingly touching pay-off. Harvey still remains the best part and I liked the little bit we got of his Two-Face.
Ducard was one of Bruce's mentors in the comics and he had a French accent, so he definitely wasn't Ra's again.
Though I'd be cool with taking a break from the League.