It would be great to add this to the list given syncing is available on other products. As a loyal paying customer, I am happy with the product but do feel the below are crucial to retain customers as competitor's products are not standing still. (in particular syncing)
Using Authenticator on several devices is possible but not syncing smoothly so we have to work with web backup/restore to work with these.
Furthermore, now PAsswordless is available, it the PUSH messages should go to all devices that have an authenticator installed, rather than just 1. Many thanks!