I'm just defending ENT from the idea that not having a DS9 style finale lessened it. I like a good finale as much as anyone but I don't think a Trek series needs one to be great.. it's not like Lost or other conspiracy shows where you are pumped into wanting answers. It's just a pretty wrap up for the most part. To me the best part of DS9's finale was that it left Sisko's fate open ended.
And I would have loved a 5th season, reading the descriptions is almost painful because it would have been quite excellent.