Hi All...I'm going back to the drawing board with my 12 year old site. I've never done a "major overhaul" like I'm planning now so I want to tread softly.
Diff factors involved.
Just the redesign will have an impact on your earnings-performance. I get what you mean being not related to the redesign but mostly removing and reinstalling adsense. My guess is, as long as the urls are the same, removing and reinstalling will have no effect (or very little) considering no redesign on layout. So my bet is focus on the layout.