I mentioned in the first post that changing the e-liquid flavor fixes it (temporarily)... I don't know how that was missed. None of the juice is "cruddy."
Still no real insight on whether this is "normal" vaper's tongue, something wrong with the tank, something else...
I don't want to just blindly buy tons of new equipment, I don't have a lot of money to spare and I've already dropped a lot on vaping stuff the past couple of weeks.
This is normal and you can expect it to be that way for up to 6 months. Make sure you are drinking water continuously through the day. What flavors you like today, will probably change over the course of the next 6 months or so. Yes, changing juice flavor frequently can help mediate the loss of taste, but it's still going to be there. All (well most of us) went through this process. good luck.