Jeff,
We are having a meeting @ the last race of the year in SOWEGA to discuss this very issue (and to iron out the Grand Prix schedule for 2016). I know there has been talk of opening up the ESC options to a greater variety of choices in the P-Limited classes, but to my knowledge nothing has been decided on at this point... I'm really more of a Gas guy and electrics are relatively new to me, so I can't tell you much beyond that. Once the meeting is complete we will be posting up any changes to the rules and the schedule for 2016.
Thanks,
Lamar