Evelynn need to be buffed/tweeked intro a jungling assasin.
Right now evelynn main problem is than she just kinda suck at both, unless she get really really fed.
Jungling
With the recent increased difficulty of the jungle, evelynn really struggle. SHE CAN get very good clear speed/efiency with a few item. but really is forcer to get some substain (botk, hextex etc) before che can do so. anyway, her first cleasright is total crap, she can barely go trought 3 camp with both potion and be able to gank like she should right now.
there is basically three way you can fix this issue, give her greater low levle damage to help clear speeed so she lose less hp, make her tankier or give her some substain system so she can survive jungle easier.
IMO, makign her tankier is not a good optiion if you want her to be a assasin...more armor/hp woudl only encourage her being moroe fo a bruiser. you want her to hurt quick, get sharp kill but be easy to fucus down.
So i think the best is either to buff Q base damage slightly, so she get a little better clearspeed and gank potential early. or to give q some substain mechanism. now, direct lifesteal/regen woudl also encourage bruiser build....so i think the best would be hp gain on KILL or ASSIST on monster/champion who been hit on Q. probly a charge based system would be the best.
Assassin
keyword for assasin is burst and mobility, at the price of tankiness.
now, they took a good step toward burst in pbe by allowing E to prom hit effect, what will encourage wit's end, botk, muranama, trinity force, devourer enchantement as mean to significantly increase her damage potential. Along if we get a little increase on Q BASE damage, she will be quite dealy damage wise.
Problem is with the mobility. Even trought the stealh mechanism is quite nice...i jsut feel like the 600 raduis still give poeple way to much time to reach..if you compare to other assasin with much more potent jump/dash.
W is a great movespeed burst, totally fine. i just regret it actually break her stealth. IMO just making her stay insivible while casting W would help A LOT.
now for that 600 detection range. ONE simple solution could be to simply reduce it slightly, maybe to 500-450, to allow her to most reliably hit this E in gank. a other way would be to add a DELAY between enterign in the 600 range and actualyl being detected...make it like 1-2-3 second scaling with level. this way she would actually be able to engage more reliably...or also avoid right if she jsut turn a corner and fall faceoff with a fight she does not want to engage.
IMO just those small change would put evelyn n back where she should be.