The big slowdown right now is absolutly in the Flush processing. When I modulize it, I'll be checking into optimizations like you suggest. Classify_Hand takes about twice as long as Combinate. I'm sure (well, hope) I can bring it down an order of magnitude.
The first iteration of a game enhancer version is at least 3 months away. I know what you're looking for, but making it both real-time-fast and accurate enough to be meaningful will be difficult. And then you'll have to convince them to allow your laptop at the table. ;)
Thanks for the input! Let me know how your tweeking goes.