Haven't tried non M-Sport suspension on the f10; so cannot give any indication of comparison.
This is just my opinion.
I recently drove a 520D M Sport on M Sport suspension & 19s back-to-back with a standard SE on 18s (275 rears). There was very little difference with regard to bump absorption over sharp ridges and broken surfaces, but the SE felt far more wallowy when changing direction and the dampers didn't seem as well able to control the extra mass of the optional 18s as they did on the M Sport. Although the M Sport may have been a little bit softer riding, the suspension seemed nowhere near as well controlled as that on the M Sport version.
I can fully believe you: I wouldn't want any more movement than I perceive in my 520d M-Sport. Initial bump absorption is fine for me.
If anything, if I think about it more, It feels like there is an extra 'bounce' in the f10 compared to the e60 (both M-Sport) when going over speed bumps, for example. Maybe it is the longer wheelbase...
I also miss whatever it is they've changed in the settings when you put the auto into Sport mode in the F10. It used to stiffen/ do something which meant much tighter body control. I don't perceive any suspension changes when selecting Sports mode in the F10...