the Buff Jarvan Needs
Dont get me wrong, I think jarvan needs the buffs he's getting, but lets talk about his ult.
His ult is described as creating impassable terrain, but with how much mobility is in the game, just about any champion is able to use any form of dash to leave the area, essentially negating the purpose of the ult, which is to hold the enemy in place.
I reccomend recoding his ultimate similar to azirs, making it completely impassable by any form of dash, but capable of being blinked out of, this hits jarvan himself as he wont be able to ult, and then E-Q out of it, but at the same time, giving his ult purpose again.
+ One more at his discretion, probably being something like mercurial scimitar or black cleaver.