So a long long time ago, Ekko used to be a jungler. It was probably my favorite time in league of legends. Unfortunately that isn't the case anymore since Ekko jungle has been gutted. I don't agree with the decision to prevent Ekko from jungling one bit. It's probably the worst set of changes to ever happen in this game. I absolutely loved Ekko on release, he was so strong and flashy, he really felt like the one champion I had been waiting for my whole life. I know this probably sounds cheese or dumb, but I really did love that champion. So it really hurts when I see him being played mid and I can't enjoy the fun of playing him anymore. Some might say that you should just play mid then, but the thing I hate most about this game is csing. That's the real reason I play jungle, so that I can avoid that chore.
So I believe that this is the patch that destroyed his jungling
On-target cooldown increased to 5 seconds from 3.**_
Outgoing AP ratio increased to 20% AP from 10% AP.
Incoming base damage reduced to 40 / 65 / 90 / 115 / 140 from 60 / 85 / 110 / 135 / 160.**_
Stun duration reduced to 1.75 seconds from 2.25.
Base damage reduced to 150 / 300 / 450 from 200 / 350 / 500.
AP ratio increased to 150% AP from 130% AP.
So without even considering jungle they destroyed his passive, which was the one of the major abilities that was allowing him to jungle. It also didn't help that his base damages got gutted systematically patch after patch after patch and that was mainly due to tank Ekko. There is a quite simple fix that I believe wouldn't be too hard to implement and that would be to allow Ekko's passive to never lock out or have a reduced lock out on neutral monsters. This would be a slight buff to mid/top Ekko as they would be able to take neutral objectives a little quicker, but this would be a godsend for jungle Ekko. Also there aren't very many runic echo junglers and it would be great to have another, I think only 4 champs use it and those being Gragas, Elise, Evelynn and Nidalee, sometimes Gragas could just buy cinderhulk as well. So I think having another ap jungler to play wouldn't be so bad. Also c'mon riot it's called "runic echos"
Ekko jungle needs a buff the perfect fix would be to allow his passive to either never lock out on neutral monsters or have a reduced lockout timer on them.