This command should do the following:

• Re-assigns clips to Take Lanes so that the least number of Take Lanes are used. 
• Remove unused take lanes.
• Re-number the take lanes. (if necessary, could just re-assign clips to Lane1,2,3... etc as required)

Document that this function will discard/reset the association between clip and "physical take #".  
When complete, the track will contain the minimum number of take lanes required to hold all clips without forcing clips to overlap in a single lane.
 
Justification:
I don't record in "takes" as such. I know I'm not the only user who records tracks in sections in sound-on-sound mode. By the time I've finished laying down the bass, I could have 25 lanes, each with a single clip. In order to start trimming and reviewing, I need to (well, desire to) manually re-assign clips to lanes, for convenience.
 
I know the algorithm to perform this operation exists in your code base, because SONAR X1 and earlier did it for Track Layers. Please restore this command to the SONAR toolbox.

Alternatively, if there was a preference setting for SONAR to ignore the concept of a "take" as something to be protected, and just put newly recorded audio into an existing lane that has no existing clips after the current NOW time, that would also satisfy the requirement of this use case.
 
Something like
   [x] re-use existing take lanes where possible
or
   [x] create new take lane only when necessary

I really need this.