They are great tires, I am not sure what people's complaint about wet traction is....all trucks suck in the rain and you can make any tire spin with how heavy you want your foot to be.
Yes I ordered one at the beginning of July and just kept getting the runaround, dealer said there was a big shortage at the factory. I eventually found one at a dealer about 5 hours away and paid to have it shipped.
Depends on the tire. Sometimes the 35s have a heavier load range than the 315s and typically a 35 is an MT and a 315 is an AT. Overall they're pretty much the same tho.
I've got a set of Aturro M/T's and they seem to be pretty good. all 4 of them had a really low road force which is usually a good sign for tire quality.
I did this lift as well and it rides great, can't really compare it to stock because I didn't put many miles on it stock. I just couldn't justify throwing away brand new shocks and springs. Depending on your wheel set up 35s do rub a bit on the max tow bumper.