I would argue that one of the reasons RID gets very little discussion, & even fizzled out in terms of discussion before it could finish its first airing, is because brought nothing new to the table. So while we did wind up with a bunch of new characters, RID added nothing new to the mythos. BW introduced sparks, the Vok, and the idea of blending organics with machines. BM explored TF religion, technorganics, plant transformers. Armada gave us MiniCons Cybertron gave us colonial planets, and a whole pantheon of Primes. TFP gave us Unicron as Earth, the scraplets their first on-screen representation, etc. RID gave us a standard battle between bots & cons but did it expand the mythos in any way?