In my opinion, it was a failure of the writing to need five additional seasons of a tangential cartoon to get the full enjoyment out of the films.
Prior to the Prequel's, the movies completely stood on their own, with little to be gained from delving into the extended lore (again in my opinion).
So what we got this time, was a trilogy of films that didn't completely stand on their own story-wise, since Lucas lazily (imo) intertwined with a cartoon that doesn't stand on it's own either.
That is just poor storytelling (again, imo...)
With all that said, I do enjoy the prequel trilogy primarily for the endless flow of memes that have resulted.
To be honest, I've probably gotten almost, if not more entertainment out of that, than the actual quality films of the OT themselves which are some of my favorite movies of all time (primarily ANH and ESB).
So kudos to the prequel's, but no, they aren't nor will they ever be considered near the level of the OT or the new trilogy.
ON NEWS TOPIC:
Endgame to pass Avatar mid week? or by the end of next weekend? (globally)