Arcana Heart 3 is great. I haven't played BlazBlue CS Extend, but CS/CS2 were good, and I doubt Extend f***ed that up. SkullGirls is coming out eventually, and it looks great.
Uhhh, let's see. King of Fighters 2002 Unlimited Match is on Live Arcade, but you didn't like KoF XIII, so maybe that's not for you either. I'd suggest ou still try the demo, though.
Neo Geo Battle Colisseum is on Live Arcade, too.
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Ace Detective in Sir Chris' Police
I assure you, my dear, all Ace Detectives are perfect gentlemen!