Well if WN does go TA then they will have lowered the bar even more.
I did a BWI- SAN nonstop on WN once and it was the worse thing ever!!!! I cant imagine some sorta 737 BWI to LGW/LHR.
Can you imagine how early you would have to get there to sit on the floor at the A line to get a bulkhead or exit row?
US's TA isnt the best but by no means is the worst...