This is something that makes me curious, and i wanted to see how you forum-goers think about it.
1. Will there be a RSE Temporal Destroyer & Science Vessel?
The assumption I'm working on is that since most lockbox ships are faction neutral (Galor, Tholian Vessels, etc) except the Temporal Ships which have a unique Fed and KDF flavor. Will the RSE get its own Temporal Ship flavor?
2. What about other faction neutral things? Liberated Borg species? Joined Trill species? etc.
1) Needs a new model, I suspect they realize the problem and already made one.
2) Liberated Borg just needs Romulan parts added, I dont think that is a problem but Joined Trill? no, it was a pre-order bonus of some kind that made it to the Cryptic Store (now Zen Store) later, there is some evidence that Joined Trills served in the KDF but there is none that ever served on the Romulan Navy.
Trills are not neutral, they are a member of the Federation, having Joined Trills on the KDF is already pushing it but, as I mention, there is evidence of that but thats it.