Okay, here's the thing. I started a new game (third time with my elf as I still wasn't happy with his face even after 17 hours >_>). I have only walked around in the Hinterlands so far, and I actually seem to be getting a normal amount of music and banter.
Music seems to be partly tied to location, at the crossroads I consistently get music, I had music in the "war zone" area while mages and Templars were fighting there that has disappeared now that they're gone, I also seem to be getting music when I go to the Redcliffe farms. Other than that there are shorter snippets that play every now and then.
I've been getting quite a few conversations between Cass and Varric and Solas. Some I've heard before, others I haven't. I haven't counted exactly how often and when they've happened, but it certainly feels like they're talking all the time now, compared to how it was in my previous games.
The interesting part is I haven't done any of the fixes listed. None.
I have not done the camp/mount/rest trick.
I have not cleared my journal of "new quest" tags.
I haven't done the fast travel through war room trick.
In fact, that's the one thing I've deliberately done differently - I have avoided fast travel through the war room altogether, even when first unlocking the Hinterlands. But I've no idea if this has done the trick or if it's been because of the reroll or if I've just been lucky today.
I will continue to stream. Anyone wants to check it out, beware of spoilers.