I will back up tp3 here, perhaps surprisingly.
While personally I used to consider Ep.29 to be the absolute best of the series, and it still would have a place in the top 5, I think I understand what someone can have against it. Someone, who enjoyed the first 16 episodes all right!
For 16 episodes after the Pilot the supernatural universe in Twin Peaks served showing the drama of ordinary people, who were not supernatural entities (even if they were connected to them). As a conclusion - all the supernaturality was fitted perfectly within the logics of drama, only adding a new level to it. The supernatural was REAL but also - closely tied to the "reality".
Then, after Leland's death, all the supernatural is lost... for loong. It kind of comes back when we move towards Project Blue book etc., but I feel this is more an X-files kind of supernaturality than what we had before.
The last episode suddenly brings it back - right as it used to be! Fantastic! Wonderful! They're all back, The Giant and the Red Room, and BOB smelling with Scorched Engine Oil. I loved it and the moment when I realised that the last episode brings it all back was for me a moment of unforgettable excitement when I first watched it.
Now, I shouldn't be saying was all the time, I still love it. But at the same time I must admit that the sudden come back of the old friends was a bit like.. taken out of a hat... ;-)
One could say - it wasn't prepared well enough. All supernatural that took place before Ep.16 always fitted perfectly to the whole context.
And here, well, I can easily imagine a person disappointed with the previous 12 episodes bringing our expectations down (one has the right to be disappointed, let's admit it) who then suddenly sees that they're trying to act as if nothing like that happened, as if we're still in the middle of the most challenging show, endlessly rich with spiritual meanings... HMM.
The Lodge sequence is splendid in itself but is it still so well placed within the context of what I called "drama of ordinary people"? I don't think so. It looks quite as if it was done for its own sake, not to be a part of the drama.
See what I mean? It worked for me but I can well understand someone who'd find it too hasty, too loosely connected to the rest of the story, and moreover - why does actually Cooper fail? I've never heard a good explanation myself (except for: why not? ;-)). Before Ep.16 all the supernatural actions were very well grounded and well, logical. In the last episode... another HMM from me :-)
Bobi 1 Kenobi
B. Beware
O. Of
B. BOB