Experience from the ground: I almost always play from the ground, and always get attacked from above. You seem like the person to always play from a jetpack, obviously proven from speaking on behalf of the jp community. And, even when I do use a jp, I attack ground players, all the time. This is my experience. Going back on topic you're giving people with the ability to fly with one of the most powerful and most expensive weapons on the game. This needs balanced. You shouldn't be able to mix the two best items in GTM and allow it to be used.
I played on the ground for several months when i was building myself up, still to this day i play on the ground. Believe me i died to jpers all the time, but now that ive perfected my strategy i can take almost any jper that comes close to me down low enough to where they dont come back. Onto your second point, without the katana the jp is nothing, it becomes one of the mist useless things in the game and the jp community dissapears. Goodbye jp community, goodbye server.
afchlam The jp and katana aren't overpowered, cops can arrest them with ease, if they are on the ground you can net them possibly, if you have a minigun it kills them within seconds from close range, chainsaws and drugs can be used, going into buildings, and a multitude of other ways to counter a jper. If you think that jps and katanas are to OP then try to get better instead of complaining on forums for a nerf. JPing takes lots of skill and practice so it is an earned thing to be good at it. No one just wakes up one morning and can kill anyone on the server without a hacked client. If you don't like to JP then dont, winging i find is more thrilling there probably isn't going to be a JP nerf anytime in the future bc if there was it would be like the minigun and we saw that a ton of players left bc of the mini nerf. There aint gonna be a jp katana nerf.