last one.. notice the leg pocket, it looks very bad with just one smooth.

I think a solution would be to give a level 1 smooth everywhere and smooth again the problematic area?

Also, will it be possible after I smooth to go back to a less detailled level in case I need to do some changes to the model? Right now, I am saving at every steps to make sure that I can always move back in case of need but I was wondering if there was a more efficient way to do so.