The focus weapon has been the go to choice when looking at the tempest profession for a while now, the off hand weapon provides great utility that can help make life easier when using overloads.
I believe in order for off hand dagger to work with the tempest profession as well as the focus weapon something has to be done about the current design of overloads. As long as we have overloads with a long channel time I dont see the tempest ever leaving its current state in the meta.
Please consider reworking how overloads should be executed, dont make them lock the class out of an attunement for 20 seconds and stay away from the idea of long channel times.
Not only does the current tempest design prevent some weapons from being as useful as others but it also imo has made the class extremely dull compaired to what it used to be.