Pipeline,
Yes sure there are unorthodox ways..
Couple of more "workarounds":
1) As soon as "certain" bars sound good, export whole thing as individual WAVS, crop in DAW. Continue with same pattern
2)Freeze all tracks -> Save project "AS". Continue saving "frozen" projects not to lose specific sections. Name projects like "Chorus 1","Verse 1" etc.
The request is not "how can I?"... The request is making things more intuitive and logical without acrobatics & extra stuff to remember
Ideally: Right click on selected bars-> Export selected.../or freeze selected*
Still, "Freeze Selected Bars" would be choice #1.