Another close vote review queue suggestion...
What about making quick-links for the close reasons already voted upon?
This should make it a bit quicker to work through the queue.
Obviously these are very brief descriptions of the reasons and thus won't be too useful for users new to voting to close, who aren't too familiar with the reasons - perhaps it should be a 10k (?) privilege, or unlocked after a certain number of close votes / reviews.
This would obviously make it a bit easier for robo-reviewers - being a 10k privilege would hopefully help (are there many 10k+ robo-reviewers?).
Obviously belong on another site and duplicate probably won't work here.
Yeah, display all options probably isn't a good idea.