Relatively new to STO. I do however know that when new episodes come out, the first time through some of the rewards tend to be one-time only, and are either hard to get later (or can never be obtained again), e.g. the Reman bridge officer.
As such I'd like to ask what is likely to vanish forever once the "first run" is over in the next couple weeks. I have several toons cooling their heels after the Ody giveaway, and if I'm only going to be able to get them this stuff now, I'd like to know what it is that I am likely to be unable to get later, so I can pick which ones to focus my time on (aside from my main, which already has the Jem'Hadar BOff wandering grouchily on the bridge).