I'm sure this is an observation many have made, particularly when it comes to the Borg. But if you notice, this is also a problem when it comes to casting.
We've seen Vulcans and half-Klingons (Tuvok and B'Elanna) before. It would have been better if both actors were cast as different characters from different races. As much as I find both Tuvok and B'Ellana interesting characters, that would've been a better way to go, IMO.
I could see Roxann Biggs-Dawson cast as a hot-tempered Andorian, for example, and Tim Russ as a character from a completely new race, or as a Bolian. At that point, Andorians had only been seen fleetingly in ST, and ENT had not launched and explored the 22nd century Andorians.
So if you had the opportunity to remake both characters, how would you have done it?
Red Ranger
We've seen Vulcans and half-Klingons (Tuvok and B'Elanna) before. It would have been better if both actors were cast as different characters from different races. As much as I find both Tuvok and B'Ellana interesting characters, that would've been a better way to go, IMO.
I could see Roxann Biggs-Dawson cast as a hot-tempered Andorian, for example, and Tim Russ as a character from a completely new race, or as a Bolian. At that point, Andorians had only been seen fleetingly in ST, and ENT had not launched and explored the 22nd century Andorians.
So if you had the opportunity to remake both characters, how would you have done it?

Red Ranger