The stock launch escape system is really weird. Instead of flying directly up it fires to the side resulting in an uncontrollable spin and imparted high G. The fuel burn is also way too fast and far too short. If you try to abort on the pad, you cant gain enough altitude to safety deploy parachutes.
I've been trying to modify the part file so that it the thrust vector is straight up, there is no lateral force and increase the fuel load so it burns for longer. I can't figure out how to do this.
Id appreciate some input.