The final episode of Enterprise doesn't do the show or characters great justice. Commander Riker of the Next Generation is at an impasse and he must use the Holodeck to make a decision. His choice is to observe Trip's last mission and it happens to be the one shortly before Archer's great speech. The action aboard Enterprise is set 6 years after the previous episode "Terra Prime" it aims to lead viewers right up to the forming of the alliance. The chief concern is how Trip is dealt with. His death is a needless martyrdom against random aliens who are after the blue skinned Shran. It's not believable or logical that he would set up a system that would blow a hole in several bulkheads, killing the aliens and killing himself. Then, just days after he perishes from plasma burns, the crew don't even seem to care that he is dead. Perhaps his death is an allegory for how the series was treated.
Trip and T'Pols relationship has also been dead for 6 years, nothing has advanced. Even after losing a child together they choose to go their separate ways. This seems rather cold hearted and implausible given the journey we have seen. The rest of the episode is just a jumbled mess with only Shran's daughter's phrase "Thanks Pink Skin" providing laughs. As an episode of saying goodbye to characters it does so by placing Riker as the cook and having the major characters come and talk to him. Most of this discussion is about Trip, but it really does little to help Riker make his decision or help us tip our hats to the characters. There were better ways to say goodbye.
Season 4 has been a bit of a mess in general. The early stages were interesting with the focus on Vulcans. There are a great number of multipart episodes that serve to save money on sets and actors. I feel that the last true Enterprise mission was probably "The Aenar" which concluded things fairly well with the Romulans. The only thing wrong with that episode is Trip leaving, so perhaps the ending of "Bound" is a good enough way to finish Enterprise. Certainly was not a fan of the "In the Mirror Darkly" episodes which seemed to serve no real purpose other than some kind of technicoloured fan service. Both Terra Firma terrorists episodes were awful too even with Robocop trying to steer the sinking ship. Malcolm, Hoshi, Trip, T'Pol, Travis, Phlox and Archer deserved a better note to finish a good series.