I've been at this for a few nights now, tracing my steps looking for anything I might have missed. Heck tonight I even tried a completely different ECU revision (RN box). Nothing seems to make a difference in getting the ECU to follow BTS fueling when the EGT threshold is reached.
It seems to only want to follow LAMFA, and only starts to get much richer towards the end of the RPM sweep and that's probably due to knock.
This is all on my 1.8T (ME7.5).
Here are some logs, and a shot of the BTS setup in my file. If anyone needs the flash to help diagnose you're more then welcome to PM me and I will send it to you.
Cheers!