Much of the tech in First Strike is not seen in the movies but is taken from what is known as the expanded universe, ir stories and games set in the same time frame that have expanded on the original movies.
Jetpacks. Fun, sure, but even in Star Wars they would have had a limited flight time so if they went back in I'd be looking at reducing the amount of flight time and removing it's ability to 'refuel' by itself. I'd probably make the flight time so low that you wouldn't even make it up Null's largest mountains 
The main reason for removal though is that it proved to be detrimental to gameplay. You all spent more time teamkilling each other to get the jetpack or camping the area it was found in that it proved to be better for everyone if we just removed it. If you want to blame anyone Duke for getting rid of it then blame yourself. Hypocrisy (hypocricy?) doesn't come into play at any point. As has been said time and time again, FS is about making a game that is as lore accurate as possible and maintaining a style of play that ensures the action happens quickly in order to keep the game moving. Fighting over a kit completely negates that.
Bite my shiny metal Tie Fighter!

