Also, what does it mean when your adc is autoattacking creep waves early game? Is that just a thing that happens sometimes, or something that happens when you play with people who suck, or what? Happened the last two games, all game, and now I'm really curious. Neither of them were forced into it either, though I think top and mid might have been gone.
EDIT: Also have I mentioned I love Vayne so very, very much? All you have to do is avoid damage entirely and you become a ruthless butcher at your third item, boots included.
Lane control is an interesting aspect in LoL, the normal meta for adc's is just last hit to keep minions in middle but if you are pushing a lane it can yield advantages, if your an aggressive lane then clearing enemy minions or pushing the lane back a bit can give you more control of the bot bushes which can also allow in-lane ganks from your team, it also can mean less minion damage if you do choose to engage.
Then there is pushing wave back to enemy tower, this usually results in less farm for the enemy as tower takes kills though does leave bot vulnerable to ganks but warding can stop it. If top and mid have gone then it's better to push while you can because bot will be the next target so you can delay it by pushing back the creep wave.
And Vayne is OP, doing true damage as % of enemies health is completely uncounterable, she is destroyer of tanks and then her invisible rolling around means she can kite in the middle of a teamfight. Good Vayne's are deadly as hell even if they lose lane completely in early game, late game they can still destroy anyone.
Maybe I should go Tank/AS Vayne top...