I believe you just need to be able to disable misfire detection for RLTC to work.
Most OEM TC systems (even supposely advanced versions) are inferior to the Racelogic system from what I've read, and as you say have no in-car adjustment whihc allows partial tailoring of the system to suit conditions, driving style, modifications etc.
No,
There is a chance if you have to may Hard cuts then it might kick but I would be very surprised if it did. I have never had my misfire detection kick in when using my RLTC even when I've been playing with it on track.