you should make a Lee attack that can be long ranged, like it charges them. like you can attack people from far away like you hit them from far away and it shows your icon appear next to them and then back to where you were, and you need to be in like 3rd or 4th gate to use it.
and make it so you cant see any enemies in the dungeon unless ur in the room with them, like make walls or doors or something cause people use Katon and BAM
and and, make it so like when your like level 200 or 250 you can like become a sensei and like train other people by like sending summons after them and making them beat them and like other training stuff like making them carry a giant rock on there back up a mountain and like uhh for speed make them run from one part to another part(if you add in speed stat) and a bunch of other stuff
another idea I got is a hearing stat where there is like a meter on your screen and you can train your hearing by like meditating and stuff and the better your hearing the meter goes up when people are walking by and water walking and you can have stealth, the quieter you run and make it so you can walk and run and stuff
and uhhh make it so you can try to survive during a battle instead of being knocked out and going to respawn point, you can try to survive but if you die after trying to survive you lose some stats or it takes longer for you to respawn or your stats are at 0 for like half an hour and they restore slowly restore during the time period (like your recovering and it wont let you use medkits or anything) this would be good cause like Lee did, and he kept fighting and fighting. You could have like a village medic to that can heal you and stuff.
No, I actually thought that was kinda good like an outline of your body shoots rapidly fast in front of you and disappears in five steps, see not too fast but better than nothing.
Lee's really don't need a long range attack... considering that not only do the gates increase there attack to the point where they can one hit kill almost anyone... but there speed gets increased to, so they can catch up to anyone with ease, adding a long range taijutsu to that mix would just be way to powerful.
As for your second thing, you dont get exp unless your in the room anyways.
I like the speed stat idea.. but everything else seems rediculasly redundant for idea 3.
As for hearing, Do you have any idea how difficult it is to try and put in a realistic sfx system, they use teams of fully trained proffessionals to do what your talking about in real games>.>
Final idea... Thats got to be the most useless idea of the bunch... i dont think il even bother with it actualy..
If they did give Lee's ranged attack they would only be able to use it once in awhile since Lee's can only use Taijutsu and all the taijutsu moves have timers where you can only use it every 5 seconds, I think its good cause everyone else gets Kawa to run away, and all there long ranged Jutsu's that they can shoot from far away, just trying to even out the playing field