Waterproofing at a swing door using a metal sill pan

Attached please find a sheet of details for a swing door in wood frame construction using a fully soldered sheet metal pan. Some of the concerns that I have with using metal as flashing is the thermal bridge created by the metal running from the exterior to the interior. The rigidity of the pan also causes problems with build up at the jambs, it is hard to achieve slope to the exterior, the backdam angle is weak and often trampled by the time construction is finished and unless you are on a curb the metal pan does not tie in well with the adjacent waterproofing or below grade waterproofing.

My preferred solution is to use a liquid applied waterproofing and a metal or wood backdam angle to run the waterproofing up onto. You could use a urethane traffic coating, Alsan 500, Kemperal, BEI Wet-flash, or if you are careful an application of peel n' stick if detailed correctly would do the job adequately.