Currently we have the Cut, Note-Off and Continue modes. My suggestion is to add modes or just add an additional tick box for making the modulation of the instrument to retrigger while the sample continues and maybe also the opposite way around where the sample retrigger while the modulation continues.
I think this would be very useful in a lot of situations, like when your instrument is mono with a glide factor, making the mod sets retrigger without breaking the portamento.
Maybe 2 drop down menus on the NNA row, one for sample and one for mod set?