Chipotle probably added queso to their menu because their main competitor Qdoba has it, and people were asking for it. I've never had Qdoba's either.
I'm less likely to go to Qdoba, but when I do, my preferred order is loaded tortilla soup(Qdoba used to call it Mexican Gumbo.) It's been a long time since I've been there, quite a while since I've been to Chipotle, as well. I looked at Qdoba's menu a couple of minutes ago and noticed they have smoked brisket as one of their meat choices. I don't recall seeing that before, but I may have just forgotten what Qdoba offers.