I generally agree with most of that. Personally I rather liked the PT especially TPM. We finally got to see what fully trained Jedi in their prime as members of a still strong Jedi Order were capable of and expected to be in the old Republic. That was something I wondered about since 1977 when Old Ben hinted to Luke about their history as "guardians of peace and justice". We learned more about the nature of the Force. We finally saw the Clone Wars and how they led to the Dark Times and the rise of the Empire.
Those were all mysteries that OT fans were wondering about for over 20 years and I'm glad GL let us in on them finally. Even if not everything in the PT was as we fans might have preferred it was still worth it for those reasons imo.
And now we'll finally find out what happened after the OT. I might not like everything about that either, or I might, but I'll be glad we finally get to see onscreen where some of our favourite characters lives went after ROTJ. The ST like the PT will serve a purpose.