Many complaints on here about the family accounts only allowing one stream at a time instead of the up to 5 simultaneous streams. Sonos will only allow one Pandora account (one email) to be added so that creates problems right there. Also, as your valued customers go about their lives waking up a a favored Pandora channel on Sonos coming on automatically in the mornings and turning off automatically shortly after we leave for work. Driving to work listening to a Pandora channel, to arriving at work and streaming it again. If any one of these is running elsewhere, you get the message "someone else is listening to your Pandora account right now....."
The request in my mind is simple. If you pay for the family plan, allow up to 5 streams running concurrently period. If should not matter if they are tied to a single email address, 3 email addresses, or up to the 5 email addresses. Wouldn't this solve this issue that so many of your paying customers are complaining about?