Per-Event Expression-Map Articulation Velocity?

Is there or could there be a way to specify the velocity value for each individual expression map event? Currently, it looks like you can only set-up a fixed value in the expression map set-up for a given articulation. Some VST instruments give you the ability to specify the “strength” of an articulation based on the velocity of a held keyswitch key overlapped with subsequent notes. (e.g. some
guitar libraries) For those VSTi, I can’t use expression maps on their own.