It would be really great if choosing an existing calculated metric was
an option for creating another calculated metric. For example, create a
"total acquisitions" calculated metric that sums 4 different success
events. But now I want to create a cost per acquisition, or total
acquisition conversion rate - I now need to add these 4 success events
again into this new calculated metric. Plus, if new success events need
to be added to the total acquisitions, I'd now have to fix all 3
calculated met...