Matrix controller quantization?

Has this ever been discussed?

I think it would make sense to be able to place controllers in a 
non-continuous way on the (horizontal) time-scale depending on the 
selected matrix Grid or quantization.

This would be useful e.g. for sustain controllers, exact panning, but 
also more creative 'rhythm-based' controller changes like a filter 
frequency or Q of synth...

A bonus would be being able to start / end inserting a continuous 
controller line (i.e. when holding down SHIFT), but making sure that the 
start / end fall on a grid point.

Thoughts?

Lorenzo