I love the Specializations in STO and really feel that they add a lot to build diversity, which is a great thing.
My Federation Science Officer flies the Wells Class Temporal Science Vessel (the ship from the future - 29th century - that was featured in Voyager), along with the peripheral ships that provided the consoles to complete the set, and my lovely wife just bought me the new Tier 6 version for my birthday! It's amazing, because I've been flying those ships, the most Temporal-Themed ships from Star Trek canon, for a long time, but they were Tier 5 and didn't allow for specialization seats until this new one. Now I'm really enjoying the TO specialization as well!
My Kelvin-Themed TOS Engineering officer flies the Kelvin Enterprise and uses the Command Specialization, which fits well and is pretty fun in groups.
And finally, my DS9-Themed Tactical officer flies the Defiant and really makes excellent use of the Pilot Specialization (which, at the moment, is probably my all-around favorite hehe).
I haven't really experimented with the Intelligence Officer Specialization, nor have I had the chance to take a look at the Miracle Worker either. I am really curious about looking into the new Constable Specialization, though! Can't wait to give that a try.
What's the new T6 ship you got for your TO Tac Officer, @Scoobs?
~M~