Disagree.
I don't think the CGI has aged as badly as you're making out nor did I have much issue with the Ents.
I would argue that it only falls below the Hobbit due to 10 years of techonolgy between the films and a higher budget
As I said, those shots didn't look right at the time and they still don't now. Feels like people are clutching at straws.
Its the broader shots for me in LOTR that do not work so well, where the characters are small, and the animation appears stiff. As for the Ent's I thought they looked embarrassingly poor upon release, and look even worse with the passage of time... but that is mostly due to using live-action models, and not CGI... they look like puppets.
I'm kind-of nit picking though, as I love the films, but generally think The Hobbit's effects look great, with very little standing out for me as substandard.





