No. There will be no more features added after it is released.
Yeah, it'll work like it does now. You'll post in Meta with your request and I might add it (or have it added) if it's a good suggestion. Epochtalk will also exist as a separate software project that other sites can use, so you could probably also post an issue on github or something if your suggestion is relevant to more than just bitcointalk.org.
Thanks, theymos! As Epochtalk maybe used for other sites, make it better as much as we can.
@OP: Mind locking this?
-MZ