This is all an opinion, so don't go insane over it.
I'm honestly indifferent about the idea of jetpacks. Sure, it makes people reminiscent of the jetpacks back in the FttP days, and sure, maybe people will 'camp' in mid-air with them, but at least realize there's solutions to nearly everything.
I think jetpacks would be nice for some maps, where you'd need to access certain areas normally non-accessible. It'd also bring a new level of combat by allowing aerial combat. As for camping in mid-air, I suggest reducing accuracy of all weapons while in mid-air; moving and shooting at the same time should cause the accuracy to be abysmal, requiring skill to land shots and maneuver at the same time. The jetpacks should, of course, be limited, but it should also be customizable, such as how long it can be used for, thrust power, mobility, etc.
Or you could just have a reload system, but that's another discussion for another time.
Personally, I feel jetpacks could allow a lot more people to become mobile throughout maps easily - like how people always selfboosted across maps and such, without the huge skill gap (players not being able to do so versus players who were able to). Jetpacks, in my opinion, should be easy to use, but hard to master - a revamped version of selfboosting that can easily be done by anyone and hopefully everyone if you will.
NNC wrote:Wouldn't jetpacks decrease camping instead, as the players would be able to fly over camper's cover (in some situations)?
Not really. While you could be able to evade enemy fire most of the time, it'll also promote acting as a sentry in mid-air, where players can just camp and hold their position in the air. With the way I see it, it'll be a bit more difficult to kill aerial campers because they can always simply move out of the way and towards another spot, provided they still can if jetpacks are limited. There's quite a lot of tactical uses for a jetpack alone - you can move from one place to another, gain a vertical advantage, and you can even turn yourself into a rocket that rams into people.