I don't think the top lane choices are going to matter.
I'm more worried about what I've been encountering in regular games - an influx of level-up bots, people who go AFK for the slightest reason, people who feed repeatedly because they want to go play another game with their friends, being good enough to get constantly 2vs1'd top because your jungler is dying to raptors at level 5 while theirs already got a dragon and ganked all three lanes twice, and the most broken five champions in the game remaining broken.
Worried about Vayne are we? Okay, free advice. Play
- build death's dance and 2 armor items. You'll tank 14 turret shots and 3 of her W's and regenerate it all back ten seconds later. Or, you can use
and do about 1,200 damage in 3 seconds and heal all your health back. Even better, throw
up there so he can show Vayne what a really broken champ can do when he tanks 90% of his health and regains it all back with 2 shots and a meditate under her own damn turret.
I've been Vayne top and fought her top. Against people like Garen, Yi, Tryndamere, and Yasuo I -want- Vayne because she destroys them. Frankly, I'm glad the mains of those champs are starting to get worried because its about time they sweat for a change early game instead of destroying anything in their path.