I'm gonna go out on a limb here and say that the fact you appear to be getting close to zero banter between party members at all is completely not normal.
Mine has varied based on my party combinations and which patch version I am at, but even when patch 4 apparently "broke" the banters, I was still getting something.
Patch 5 seems to have fixed it for me, and I'm getting what I consider to be a pretty normal level of banter. An example is that I just got through doing some early running around on the Storm Coast with Varric, Cassandra and Solas in the party with my female Qunari mage Inquisitor. Varric made numerous digs at Cassandra for her recruiting techniques, Solas commented on a whole bunch of things, and even Cassandra asked Solas what it felt like when Templars use their power to suppress magic and then she griped about the weather.
I don't know if you've tried this, but it might be worth doing - open Origin, go to the My Games tab, right-click on Inquisition and select "Repair Game" and let Origin check and verify that all your files are intact. There is always the possibility that you have a corrupt file somewhere that is causing you to have issues that don't appear to be happening to everyone in general.
While the no banter thing isn't exactly game-breaking, I do think it would be a real let-down. Half the fun of taking certain combinations of party members different places with me is listening to them tease, harass and get to know each other. It really makes the game feel "alive" for me. Missing out on that would suck.
From what I've seen and read around the different forums, I'm pretty sure they're still working on the whole banter system, so it's likely something that will be tweaked again in the next patch, but even now you should be getting something. Wish I could be more help. :catsad:
