Ah, yes...the ever-mounting problem of CS becoming the "Everything Department."
What I've found to be the most effective use of time and efficiency is to document/track the most common product "ideas, issues, requests" etc.
Do this in either your CSP or your CRM or a flat file, tag and organize the items by functionality/feature/product capability.
Also, make it easy and organized to CSXs can do this in-the-moment or shortly after engaging with a customer.
You can also collate this data from a Community and/or Support forum.
Then, assign either an At-Risk or an Upsell $ amount to them.
Aggregate these and present them monthly to your xfunctional partners: Product, Marketing, Cs.