Spence, I think it is cool that you managed to keep the whole series basically, but just trimmed it down to a decent movie length.

I think you should stick with what you have as-is, but it might be worth looking at interviews with the guy who wrote the film screenplay the series expanded upon if you haven’t already. For example, Reva dying was something that happened in his script, but it seems like the rescue from Fortress Inquisitorius wasn’t a part of the original story, nor did any other Inquisitor feature beyond Reva.

Anyway, sounds like you basically have it done, so I wouldn’t spend too much more time on it (especially since you were also pretty dissatisfied with the show anyway).