I think the Tag Synonyms Suggestions system could be improved.
It is very common to see suggestions that were done nearly a year ago (unix with unix-utils, for example). People end up coming to Meta and asking for it with the retag-request.
From Suggest and vote on tag synonyms description
Users with more than 2500 reputation and a total answer score of 5 or more on the tag, can suggest tag synonyms. Users with a total answer score (total upvotes minus total downvotes) of 5 or more on the tag, can vote for tag synonyms.
It seems to me such an easy requirement to accomplish, so the problem may be that most people is not aware of the system.
So, what do you think about giving it more room in the page?
I also think Tag synonym page could indicate votes missing to be approved.