I'm suggesting a dedicated Incorrect Idioms Page, where one can suggest double-added idioms, dispute existing ones or ask to merge two into one and so forth. I know one can report via "not idiom", but I would prefer to see mods being involved in the same measure as in the case of double song entries or missing video links. I think it is long overdue, since idioms are in mess, and we can't fix this ourselves, since many users who submitted them already have left LT.
A simple example:
English idiom "out of the woods" was added in two forms:
1) Being out of the woods
2) we're not out of the woods yet
Both entries never occur in existing lyrics are of no value for anyone who would encounter "out of the woods" in some lyrics.
What should I do then? To add a third variant "out of the woods"? I'm sure I'll see a number of "hits", but there are multiple explanations already present. And I can't ask the submitters to edit their entries, since they left.