The huge updates for Janna, Yasuo, Vayne, and Malphite have all been completely reverted
The current PBE cycle of League of Legends has been wrought with excitement. Huge updates were dropped left and right for some of the game's biggest problem champions, including Janna, Vayne, Yasuo, and Malphite. It was shaping up to be one of the biggest, and potentially the best, patches this year.
That is, until literally all of those changes were reverted.
That's right, neither Janna, Yasuo, Malphite, nor Vayne will be seeing the changes they so rightfully need in Patch 7.17, because recent PBE updates have pulled them all down from the testing server. That's not necessarily a bad thing, depending on who you talk to. Where there are tons of players disappointed to not see these problems squashed right away, there is an equal amount of fans that are pleased to see the meta remaining relatively the same all the way through Worlds.
The next couple of patches are very important. Teams will be playing on them to decide their Worlds placements, and much more importantly, one of these patches will be the Worlds patch itself. If dealing with these relatively small problems for a few weeks more means maintaining stability for professional games and the pro meta, it's certainly worth it. Unless, of course, you don't care about pro games or Worlds, in which case you're probably pretty upset.
This doesn't mean that these changes will never happen. In fact, most of the changes were promising, and Riot intends to try them out again after Worlds is over. Malphite's changes, specifically, were the latest changes pulled from the PBE, but a Rioter on Reddit promised they'll be revisited.
There is one champion, though, that may never see their changes. Janna, who is arguably the most unbalanced champion in the game currently, may never see her nerfs. Riot is pushing out big nerfs to the Ardent Censer, one of her core items, and if those nerfs can bring down her stats enough, she might not need individual nerfs.
Vayne's changes are also a little more controversial, as many players can't seem to decide whether or not they're buffs or nerfs. Realistically, it seems to buff her in specific circumstances while nerfing her in others, widening her weaknesses and emboldening her strengths and win conditions.
Either way, these big champion changes will either be pushed back past Worlds, which would mean around Patch 7.20, or they'll never happen. This next patch, however, will be exceptionally boring aside from the release of League's newest champion, Ornn.