Throwers are great in little corridols, on the ladders, inside alleys.
With my whole gen of thrower I made 1.5:1 K:D, as total noob who never played this class before. It's not true you need jumping to do your job, as I never used that part, it is too fancy and unrealistic for me to use it.
But I would like to see fix with taking things from the ground, since sometimes I had problems picking up my axes again.
Also, I don't like how weapon changes from ranged to melee mode. It should be something like - when you use change mode button, it will do so when axes will be ready. Because many times I just didn't know can they switch to melee already or not.. bah, i'm dead. This mechanism should be simplified.
I don't see jumping as "important part of the gameplay". Throwers are pretty powerful against low/middle armored targets as they are now. And yes, you need to position yourself well or you won't be able to help your team, but I don't see this as a problem.
Accuracy is more than fine, and I had "just" (?) 130 WPF in throwing, 120 WPF in 1h. It was good enough on range and in melee.