Russell has had to learn to throw balls Luke can handle. That's what he's doing now. Mostly touch passes and fewer high bullets that make Willson have to stretch. Notice the balls Willson has dropped, and they were either at the outer edge of his catch radius and/or thrown with lots of zip, and/or having to twist his upper body. Balls where Willson has to reach up extra high and/or jump, and twist his upper body back towards the ball, while running diagonally away from Russelll--Willson often drops those. Hook-type patterns where Willson is coming back to the ball and Russell throws a high bullet--Willson often drops those too.
Don't ask Willson to make those types of catches (i.e., Russell, learn what Willson does well and give him those balls) and he does very, very well.
I think it's more that Russell Wilson has adjusted to Luke Willson more than Luke Willson really playing better or different. Russell is throwing more Willson-catchable balls now.
I thought the best catch of the game was from... Ricardo Lockette! Russell gave him a crap ball and Lockette somehow caught it.
Willson's big game against AZ involved touch passes over the linebackers with Willson moving away from the ball, effectively "slowing" it down. The 2 point conversion was a nice high floater to go get.