Still doesn't make sense to me. Are you looking for a way to freeze multiple tracks at a time? Maybe freezing track folders? That would be cool! Click on a track folder, select freeze, and all tracks in the folder would be froozen.
How many busses do you have for drums? More then three? Maybe this is a workflow problem?
A very common scenario for drums is:
- Snare buss for two snare mics to go to
- Kick buss for two kick mics to go to
- Toms buss for the toms mics
- Cymbal buss for the cymbals to go to
- All of the above to to a parallel compression buss
- All of the above go to an overall drums bus
All of them tend to have processing on them, sometimes a considerable amount. Once you freeze the source drums (BFD for me), then none of those busses will be used since they exist purely to manage drums. So it makes perfect sense to be able to freeze them along with the tracks they serve, since they serve no purpose while their source tracks are frozen.
The grouping feature would insure that it's obvious which busses can be frozen, becuase it would only happen if you froze the whole group and the grouping feature insures that only other tracks within that group could possibly be sending to the busses in the same group.