After trying to talk myself out of upgrading for the last week, I pulled the trigger today and got the XS Max 256 GB in Space Gray.
I went from the 7 + 128 GB and although I have only had the phone for less than 8 hours, I have purposely driven into areas where my 7 + struggled to get reception at all through Sprint.
So far, the phone is working in areas that my previous IPhone did not and I have also not experienced any WIFI issues. Of course, it's probably too early to tell one way or the other but I do find it a little weird that my XS Max will actually work (2 bars and doesn't fly by any means) in these previously "dead areas".
Hopefully, Apple will get this figured out soon for everyone who is unable to enjoy their new phones.