I have 3 Eero Pros and a Beacon (the last one to "fill a hole" in my coverage).  I have found that 12 or more devices connect to my Eero Router and another 12 - 15 to my Beacon, while only 1 or 2 devices (or NONE) connect to the other 2 Eeros.  During set-up, the spots where i placed them seemed just fine, and i have firm white lights.  But this is ridiculous.  I may as well not have or use 2 of the Pros.  Some other people seems to have similar complaints. 

Is the Beacon technologically superior in some way, perhaps because it uses the wiring in the building?  Should i try replacing the Pro(s) with Beacons if i can??