It will be interesting to see if the EP batteries at Napa, BJs, etc follow suit and are made in Mexico too, like the ones that they supply Walmart.
I will say that I outfit my Ram CTD with two value group 65 batteries from WM. Out the door for less than $100 for both, and they handle starting and the high draw of the Cummins grid heaters (up to 200A).
For $100 for both versus $200-400 for the higher end versions or AGM, it was worth it to me to try, even with group 65 being slightly undersized (OE is group 27). My truck has a block heater and starts really strong and well. YMMV.