When you Jump Jet your cockpit and crosshair will shake and cause your accuracy to be competely off. To circumvent this, you can only fire after you let go your jump jets.
1) Jump jet high
2) Jump Jet key
3) Reallign your targeting while you are falling
4) Fire
This system completely nerfed the Highlander poptarts because they don't jump high enough to give enough window for you to reallign to your target and they torso twist too very slow.
Highlander Heavy Metal will still be viable to pop tart because it jumps 28m which is 5m higher than cataphracts.
Cataphracts are nerfed as well but not as significantly as Highlanders. The cataphract jumps very high so it gives enough time for the pilot to reallign. The risk of running the cataphract poptart is that you have to use all your jumpjet fuel to give yourself a big enough window to reallign your cross hair. That means you will be exposed even longer.
Trebuches can jump even higher than cataphracts so they have a large window to reallign.
The red circle will show where you will fire while you using jump jets.
