Bob a case with me at the track we race is drag and initial brake settings on speedo!! I used to race with 2 on initial and automatic brake but as soon as i decreased to 0 the temperature was decreased too from 70 maybe to 55-60!!
also i don't use any initial or quick throtles to the transmitter!! try it and you will understand.
The setting that LRP/nosram uses like you said just out of the bag is the better setting for the motor , anything more or less will cause troubles , or so tells my experience on brushless!!
I always use even with the first competition version, capacitors and i used to use the big one from worlds kit for QC2, also i use the heatsink and fan!!
always the motor passes the temp to the speedo , as soon as temp starts to increasing , so the motor is safe but the speedo has TSD. But this doesn't mean that your prob is the speedo , it may be the motor or the gearing too.