I read somewhere that the borg were originally meant to look something like insects. In the end, TPTB decided against using so much of the budget for CGI.
CGI? CGI to create aliens? In 1989? On TV? Not a chance.
I'm not sure if you're kidding here.
Voyager started in 1995 and they used lots of CGI. There was CGI in every episode if you count the opening credits. And, of course, Species 8472 was CGI.