Jackson did a lot that was good in the original LOTR films. He cast it very well, set design and locations were excellent, and he directed it well, developing characters well and delivering emotional scenes. Overall, I was quite pleased with the films. There's no doubt to my mind that he captured the imagery of Tolkien's world superbly well. What he did less well, was not that he missed things out - he didn't have time for every scene Tolkien wrote as you correctly point out - but that he changed events and mucked around with the storyline. For instance, for me, Helms Deep has greater resonance in the book as it's rather like man's last stand after the race of 'men' has been forsaken by the elder races. This raises the stakes and adds poignancy. But Jackson has a load of elves turn up, just because he likes them I suppose. In the same film, he has Aragorn fall off a cliff, adding 5 minutes to the movies, just so he can arrive back at Edoras on his own with a theatric flourish. It was unnecessary; I guess he just couldn't help himself from changing Tolkien's story. In the final film, I didn't like how he changed the race and appearance of some of the dark lieutenants, such as Gothmog, nor made some aspects of Pelenor Fields cartoon-like in tone. But no, they were not nearly as bad as the films that shall be named no more.