For all the gang who expressed their interest in this...
The recent early access release of 1016:8 is a big step towards fulfilling the desires expressed here.
The minimum height is now a single line/height as with tracks... and the maximum has been doubled!
Almost perfect! ...and along with it, a note from Noel speaking of full zoom still to come and it is currently in the works but apparently more difficult to implement than might appear...
So breathe slow, enjoy the improvements and know that more is coming!
Thanks foe everyone's support!