I can image it's a big feature request, but maybe it's something that would be considered as useful and could be made in some future versions of Kyma.
I think capturing a Multigrid-performance in Timeline could be useful for editing it afterwards.There should be no other interaction in between, maybe "just" these things:
- sound selection (selected sound will be placed in a track in the timeline, corresponding to track in Mutigrid)
- sound duration (with corresponding duration of an active/played sound)
- parameter changes (mixer and vcs changes)
just an idea..