You can get a replacement for the screen lift issue alone. I really don't see any reason why it's not covered by warranty. If they decided that it's not covered by warranty, I would speak to their supervisor until they do. 

And they're going to work with you even though you're outside the 15 day return period?  I thought they would have told you to contract Asus support. 

Wait, are you going through asus or google at this point?  

Yellow discolouring. Anyone else have this issue? I just put in a request for an exchange (Aus Play Store).