I’m a bit late to this party having had a few other things on my mind lately. I can recall somewhere in my training reading that adding extra flap from the recommended takeoff setting doesn’t help much, if at all, the increased drag offsetting any advantage of extra lift. Now I have zero experience in flying the ‘big’ planes that you guys are zipping about in, but for me, I would keep the one stage of flap and on rotation stay in ground effect to build up speed before starting the climb.
Just out of interest, I have in the past when doing touch and go, forgotten to reset the flaps after landing (from two stages) only realising my mistake when retracting flaps on climb. Obviously my trim setting was for the two stages but I can’t say I noticed any difference in performance.