I always did think the tricorder should also be useful as a communicator... especially in TNG+. After all, if the little badge is so capable, why can't that capability be incorporated into the tricorder body. How much bulkier would it need to be? And, yet, I can't recall ever
seeing someone communicate via their tricorders.
Now, I wouldn't replace communicators entirely with tricorder units, as the combadge is pretty convenient, but I would like to see the tricorder get this capacity also.