Having watched the video on take lanes, I would say several important improvements have been made. To start with, it looks like in a collapsed track the visible audio data will be that which is actual audible, rather than the impenetrable hodge-podge of yore.
For comping the new functionality looks very deep and well-considered. God willing there will be no bugs. "Consolidate lanes" sounds like a move in the right direction.
I did not use track layers merely for comping, but also found other techniques which allowed for creative possibilities and simplified workflow. Hopefully the more-developed iteration of take lanes will provide new possibilities outside of comping.
The idea of an "intended workflow" bothers me - I would prefer to have powerful tools with which I can develop techniques. To an extent the designer's preconceptions necessarily drive the design, so that a hammer, for example, has a heavy flat nail-hitting part, and a stick, and a removing-nails part. But hammers are hugely useful in all sorts of other cases - as a wedge, a lever, a club, a toy, etc. A nail-gun, on the other hand, may well fasten things with nails very well, but it's fairly limited outside of that one purpose.