1.)
SO, if you see a player jump-putt illegally CALL HIM/HER on it. Let them know you believe it was illegal and why it was illegal and maybe they'll alter their putt and then BAM! no more rules violations the next go around.
This is where you are wrong. That can never be the solution. If I make a call, I want to be certain that the other player did brake a rule. I don't want to call someone on something I think might have been a fault, that would lead to mess.
Then comes along jump putting. No one I know is able to tell on a regular jump putt when exactly was the disc release and more importantly, if the player still made contact with the ground. Therefore, you can't just start calling people on "it looks to my eye that your feet left the ground approx. 1/125th of a second before you released the disc.
So yeah, you can dislike jump putt, you can think they are unfair, but calling a foot fault, not really (unless you can somehow freeze time... I miss Heroes)
I guess I can think of three posibilities
1- make jump putt illegal by making the circle stupid big
2- leave the rules as they are and let people that can't jump putt complain
3- change the rules outside the circle and let people jump as they wish (like in Handball). Jump forward and release the disc whenever you want before you touch the ground again... I doubt throwing while in the air would really be that much of an advantage...
Honestly, I think all those 3 possibilities suck lol. Good think it's not my job to find a solution, if problem there is.