the whole Deep Space nine series should get remastered.
They don't really have a choice. If DS9 is ever to be aired in HD, the whole thing will have to be remastered. It's unavoidable. That's because DS9 (in addition to TNG and Voyager) was edited on videotape, which is also where all the effects were done. Since videotape is not airable in HD, all effects would have to be redone in order to make it so.
Even if they didn't do *updated* effects, they'd still have to do them all over again, even if they wanted to replicate the original FX exactly.
That being said: They should get rid of the "NX-74205" on the second Defiant