Big Trad Thong is a fantastic route, only slightly marred by a little not perfect rock along the way. I have climbed worse.
That roof is more scary and airy than difficult. But it is very scary and airy. Very. It is well protected with a couple chunky cams. I think I remember getting a crucial head jam somewhere near the end. If you place your head jam just right your helmet will double as a bomber hex/noose. The crux is actually on the face before the traverse.
Rope drag was a real bitch on the roof pitch, Mikl slammed in another carrot the the left of the roof to clip after you pull over. It will help avoid draggins.
The loose blocks are gone. I'm thankful I got to watch that happen. KaBOOM.