Re: What would you have liked to have seen during the Dominion war?
Proper soldiers / ground forces. Like MACOs or something similar.
Also: any time that combat is imminent, several of said troopers should be visible stationed in the bridge and other critical areas of starships (and ops on DS9), armed and ready to defend against boarding actions.
I had a friend once, but the wheels fell off. Sad, very sad.