The stealth rework patch will also be succeeded by Zyra, who has very weird caster/pet mechanics.

Riot has already introduced one very weird champion recently that has turned out to be viable (if not strong), Jayce. Both of these champions are still 'weird,' however despite the changes, neither character exemplifies any element of the current metagame. Evelynn was completely reworked, and she is so much different from her old self that she's basically a new character. Riot Games chose to completely rework these two champions, weakening Twitch's stealth aspects in order to make him a more normal carry. Twitch was considered a strong pick on Dominion, however. Twitch was in better shape, but he was a poor selection on Summoner's Rift for either of his two roles (jungle and carry). Evelynn was in horrible shape she's the least-selected champion in the game by far, and her gameplay needed a tremendous amount of work. It's fairly common knowledge now that League of Legends is undertaking a massive rework of its two permastealth champions, Evelynn and Twitch, in the next big patch.

League of legends stealth rework