Man, I am really sorry that you are going through this. That was the reason I got rid of that F-ing Land Rover. But the thing was, is that Land Rover has that reputation, which I learned after purchasing the Truck.
Now I got the wife a 2005 Off Road Pathy I haven't noticed any of those issues you have ( It is being checked out, by a friend at the Nissan Dealership). Hopefully, they can fix it right away and this is the only time you are bringing it there for warranty issues.
Mention to the dealer about the tube that comes from the drain pan.
I have also read, that there is document somewhere you can find out when your Pathy was built or finished. Meaning what day of the week. If it was on a Friday, you may have some problems with your pathy.
Nissans are some great vehicles, and that is through experience. Good Luck. I hope it gets fixed the right way.