Pashuteh Yid: I heard from a talmud of R’ Aharon zt”l that R’ Aharon cried over what happened to Carlebach after he left Lakewood.
The thing to learn from Carlebach is Ahavas Yisrael. Not Ahavah by hugging and kissing people of the opposite gender that you barely know, but a real ahavah – he really loved every Jew. however, he expressed it wrong.
As I’ve written before, R’ Mendel Kaplan zt”l said that Carlebach’s music will make you depressed if you listen to it. I heard this from a Rebbe in my yeshiva who was a talmud of R’ Mendel.
As for calling Carlebach a Rabbi, I guess you can do that, since he was somewhat like a Conservative Rabbi – some things he was able to keep, some things he wasn’t, so he justified transgressing things with some twisted logic.
Yes, he did a lot of good, and I’m sure it was taken into account when he had his din v’cheshbon. He also did a lot of wrong, which I’m sure was also taken into account.