Some of my best friends are crossfitters...
Jaskot, your point about complexes is well taken. That's something I'm trying to resolve in my own thinking. Honestly, I don't like MetCons or complexes. Density is my least favorite method of progressing strength. The weights are heavy enough already without being gassed. I like only focusing on one thing at a time. Sort of like you wouldn't superset American presses with Irish squats.
I've pretty well concluded that my approach is to strength train, then, as long as I'm warmed up, finish up with intervals -- swings, treadmill, sled, whatever. I'm just confirming for myself what's already in ETK.
Now, slow circuits are OK, mixing cardio modalities is OK, but gassed lifting, not so much. Swings are hard to categorize but that's just mental mastication.
Irish squats -- irradiation or contrast breathing?