To be able to select events based on their articulation would be great. Or to quickly identify which events in a MIDI part are not assigned to an articulation would be just as great.
When copying parts across instruments Cubase indicates that an event is e.g. Sustain Vibrato even if the current instrument does not have that articulation in its EM (bug/oversight). So with this feature we could then select all events that are Sustain Vibrato and assign them to a different articulation. Or quickly swap a bunch of e.g. staccato events to spiccato.
Maybe the LE would be capable of doing this. One day 