Not sure if it qualifies as "advanced", but I just bought a pattern for a Christmas tree skirt and it is almost all templates! If I had of known that I would have never bought it!
Maybe this one qualifies as "advanced"? I didn't choose it...My boss had me do it for a shop sample. The entire thing is sewn on 45 degree angles. The way you would put binding together. And, the organization to make sure you didn't get two of the same fabrics near each other was insane. Definitely not my favourite but it turned out OK. This was before it was quilted.
Watson