As I see it, there are 3 major lackings from Eero. But non of them seem to be on a high priority list. Instead we get things that offer zero or marginal improvement to the system for tons of people. In priority order:

1) Total Bandwidth Monitoring at the gateway eero and per device over a specified period of time. This is absolutely necessary to help users manage their usage so they don't get charged extra fees by their ISP.  

2) A weather proofed outdoor access point. Other suppliers realize that customers want Wifi access outside their homes. Placing a eero indise as close to the outdoors as possible surely helps. But from my tests having one outside yields WAY better performance. 

3) Desktop (Windows/Mac) eero software. Not everybody needs this as the phone apps are great. But the screen real estate alone provided by desktops would seriously aid those with more advanced configurations.