What about automatic translation?
POEdit is using similar coincidences and does not prioritize full coincidences - just the first similar one the program found. So the automatic translations of POEdit are useless.
Your plugin could check in existing translation-files for full coincidences (and in the WP-Translation-files, too) to auto-set as translated string.
It would be a great improvement, wouldn't it? :-)
As big improvement you may be able to manage this via API and a big database of used translations. Maybe I could help to create such one.
Thanks for your time!