Well, the first few Atlantic albums - and the Llpyd quartet in general - were really popular back in the day, especially Forest Flower, which was a bona fide hit (and not a bad album either, although Dream Weaver is much meatier, I think), and they're good (hell, with Jarrett, DeJohnette, & either Cecil McBee or Ron McClure, how could they not be?), but the band soon devolved into sort of a jazz version of the Sensitive Soul type thing, which is not much to my liking. What's "wrong" with Keith Jarrett (and don't misunderstand me, there's plenty that's right) has it's roots in the Lloyd band of the late '60s, I believe. Too much of the putting the wounded soul on display for the purpose of selling it through sympathy, I think.
But Lloyd has always had one of the most gorgeous tenor tones imaginable, limpid yet not limp. and very vocal in its core quality. It's a sound that you could pimp like a mofo to get over with the wounded soul crowd, which is what I think he did quite a bit during his days of "stardom". But now that he's older and wiser, I think he's able to speak more substantially in that same voice.
That first quartet was the benefactor of a huge amount of backing by Geoge Avakian, and personally, I think that Lloyd might have developed better and/or sooner without it. His work with both Chico Hamilton and Cannonball Adderley shows a lot of promise - a unique voice and perspective, and that same beautiful tone. but the guy got famous pretty quick, and for somebody who already had a bit of the "hurt child" in him (there's an interview from the mid-60s somewhere done by somebody that reads more like the petulant whinings of an Important 1960s Rock Star than it does a Memphis tenor player), I don't think that was good for him or his music, all things considered. The quality of the records went downhill pretty quickly, although there's good moments on all of them (especially In The Soviet Union), but it seemed that Lloyd had other "issues", which he resolved by getting rich in real estate and going off into the world of TM. When he finally "reappeared" in the 80s, he was still a little shakey, but by the time he started doing the ECM sides, I think he had finally "put all the pieces together" and was finally able to combine the vulnerability/hurt/whatever with the mature perspective ("toughness"?) needed to play fully "adult" music.
Throughout it all, though, there's been that tone, and what a tone it is!