We are in SaaS and we use Pipedrive to track our conversation with clients. 
We have been tracking monthly reoccurring revenue with Google Sheets and would want to track Revenue from each Deal.  When Pipedrive introduced the new feature of Revenue we were thrilled but quickly found out it does not suit us. 

The thing is: one client could pay us different amounts, from start date, with different intervals.
So to have the Revenue function usable for our team, we would need to be able to create Multiple subscriptions/billing plan per DEAL.

This would allow us to track precisely based on the sum that's being renewed, I could also see historical renewal from these Deals, to use spreadsheet less.