Thanks for the reply

My MW CC is set to #1 (as by default) Checked in the Midi Center. But the MW isn't controlling anything on the MB 2S by default, that's a bit strange.
Hope Arturia will fix it with a firmware update, if they could only add the MW to the Mod1 & Mod2 source it would be great, then you can use the MW also to control a lot of other values and open up more modulation options

Or If they route it like the Keys verion to the CF
then combining aftertouch and the MW to control the Cutoff would be great. You can make a pattern with the AT and use the MW for the amount and record this in your DAW.
Of course you can do a lot of live stuff and use the cutoff knob, but I use my synths a lot in my DAW and recording the MW CC can help to do some crazy stuff that you can't do by hand.