The studio itself was deeply imitative and bereft of fresh ideas, but it made up for that by hiring some of the best people around to make their shows. So when they wanted to copy B:TAS, they went to the source and brought over some of B:TAS's own people, including writer/story editor Michael Reaves, director Frank Paur, and composer Carl Johnson. Plus they lucked out with showrunner Greg Weisman, the main person responsible for developing the show's rich mythos and storylines. They're the people who made the show work despite its origins.
No arguement there. Yes, Disney of the '80s and '90s tended to make shows that were effectively uncredited imitations of other productions, but I still thought they were entertaining productions.
BTW Greg Weisman was also on the production team for Bonkers, he wrote the 19 Miranda era episodes which survived to air. The reason more of them didn't was because of shoddy animation quality.