Skirmisher's update should come after Diver's and maybe even before.
Not every single Diver is in a bad spot. But every single skirmisher is a balance problem, and there should be a fix. You've got 3 good skirmishers (Fiora, Yasuo, Graves) and the rest are pretty much garbage (Trynd, Yi) and Jax will become trash again if Tforce gets nerfed (It's been busted for 9 god damn patches).
Each skirmisher needs to bring a different and unique utility and niche. That's how you fix them. They need to have a design path that looks more like Yasuo, a skirmisher with utility. Not edgy or annoying, but they need different utilities in order to perform.
and
a bit and you'll be fine.
or
and non-tank gets similar numerical tanky benefits that a true tank does there's a problem.