SOme droids do work. Anything with a weapon can be used for the combat beta. In addition, astromechs will allow ships to continue travelling if you enter another entity during travel. medical droids can be used as assistants during cybernetic operations. LIN droids help prevent mine collapses.
For other droids, uses are added as they are coded.
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7:13 PM] Lartog Ulmug (Sanctuary): I've never been more scared seeing a naked penguin running at me full sprint