We finally took a break about 1030. Regrouped about 3 and knocked out the last couple of missions. None of the story missions are particularly hard first time through.
Coldheart is a neat gun. Certainly different.
Also, late last night a buddy and I did a couple missions that were a bit more challenging. I'm sure we were tired from playing all day, but we ran across some new mechanics that took a couple minutes to figure out.
People are freaking out over shaders. They are in meltdown on Reddit over shaders. Glad I have never cared what my guy looks like.