Circus Peanut wrote:
It would've been better to do the scene with Wesley saying, "Hey! My friend Mordock is a Benzite!"
"Yes, Mordock. The first Benzite in your Starfleet. There's much praise for him back on our homeworld."
Explains to the audience what's going on (yeah, this is the same actor, but it's not the same guy Wesley met earlier)
But that neither gives us any (science fictiony) information about Benzites, nor explains why the production chose to use the same actor.
The audience would be left saying, "But it is
the same guy!"