As other posts elsewhere elaborated on, I have only recently returned to STO for real life reasons. One of the biggest things released while I was away was the Foundry, so naturally I jumped into it headlong after patching- And DANG was I pleasantly surprised! There is so much content in there that is well written, challenging to think through, and cleverly set up.
The latest one I finished was "The Spirits of Ramok Nor" by Alimac30, which is easily one of the best missions I have played in STO period. This post is just me saying to all the awesome authors out there: Keep it coming! The non-combat content you all have released has been stunningly fun and I wait with baited breath to see what you all release in the future.