ive got the same feeling. I need to get someone with VCDS to log my car for me. my car feels really good sometimes yet other times it just feels sh!te. but im not sure if its just me being used to having power when ever i wanted it when i was at stage 2+. im down on stage 1 now, but it just doesnt feel tip top.
My MPG is worse as well, which doesnt really make sense, ive gone from a 26-28mpg average at stage 2+, to about 20mpg at stage 1