Burrito place in the food court by the new side of B is pretty good, and is where we usually stop for food in IAH. I stay far away from C-North for food - anything with OTGs name on is not only less than mediocre, but requires an iPad to order which means substitutions or getting questions answered is a pain, and all at 5-star prices. It’s also why I won’t connect in EWR anymore unless I absolutely have to - since there are really no other options.
Havent been to Whataburger in IAH, but have in YYZ, and it’s not bad.
Best UA hub food by far is ORD, as nothing beats Frontera’s. If we need something on the go, CIBO does have decent salads. DEN also has some good food options, though I miss the option to get a Ben & Jerrys in B when I have a craving (it’s still in a, but need a long enough layover for that).