I would like to suggest a quicker and easier workflow for recording several takes in layered mode and then comping them; i.e., picking and choosing the best bits.
Instead of always playing the top-most take that isn’t muted, Ardour should play the highlighted take - regardless of whether it’s at the top or not. That alone would save several clicks or button presses for every take you audition.
For comping multiple takes, it should be possible to click and drag the mouse over the section you want and click also click and drag the position of the cut for fine-tuning.
This idea stems from a forum thread on here and my previous experiences with other DAWs:
For a visual example of what this alternative workflow could look like, have a look at this video of someone comping takes in a different DAW: