Compromise for eve nerfs

While the community as a whole doesn't appear to believe eve needs any kind of nerfs whatsoever, much less the potentially game breaking 40 mana cost W presented at the moment, I wanted to take some time to explain why it's such a huge nerf and propose a compromise.

I am biased as a diamond eve main, but I really don't believe eve needs nerfs, ESPECIALLY with both forms of warding trinket upgrades available to solo queue (both pink ward totems for obvious reasons and green ward totems (250g sightstone op) to place at all the camps). Even in diamond, I still see these things being bought in maybe half the games at best. I believe when the trend of spending 250g for permanent vision control catches on, people will realize eve is much easier to deal with (Or just pick reksai/rengar for vision of her).

The problem with 40 mana on her W is that it's an ability used frequently and repeatedly (not uncommon to see it 5+ times in a teamfight) from the midgame onwards and severely gimps eve's damage and dueling potential. It makes it almost punishing to use your W as a reset instead of a reward as you can end up oom and unable to continue doing sufficient damage (of which eve is comparatively lacking to many other champions-not just junglers). No mana = no sheen procs (since Morello implied that runeglaive is the optimal build path she's being shoehorned into, but that's another conversation) and no Q/E damage. If they're concerned about her managing mana with regards to clearing and ganking that's fine, so I propose the following change:

W costs 40 mana, BUT when it resets from a kill or assist, Evelynn restores 40 mana back.

This way she is REWARDED for proper W usage instead of punished, and it's not an ability that can be spammed willy-nilly in the early-mid game to just improve clearspeed and travel times.