Greetings,
Options/Controls/Flight Miscellaneous bindings has a toggle frame shift drive which I use all the time for high or low wakes. It knows what to do if I select nothing, a ship, a local station or another system. The only negative is not activating high wake when leaving a planetary station going to another system but the target is behind the planet. Then I have to disengage the lock on the system in the Nav panel so that the FSD will low wake away from the planet lining up with the escape vector. Once low wake engages the FSD will automatically lock back onto the destination system and can high wake once it is clear of the planet. Knowing this before departing a planet per the hollow circle on the compass selecting a system I can deselect the destination system before launching. Low wake in the same system to another station it doesn't care.
Not so apparent when leaving an orbiting station with the destination system behind the local planet. Then I have to deselect the system in the Nav panel leaving the station while in flight to go to low wake.
There are also separate toggle bindings for a hyperspace jump (high) and supercruise (low) if a player prefers that. The above issues go away if the player knows which one to use.
I mention these flight mechanics because adding a supercruise assist toggle binding (SCA...add a new acronym) will have to deal with them and it may not like it. First up it cannot be engaged unless you are flying. So much for destination systems behind planets. That could limit when it can be engaged as it also won't activate if the target system is behind the planet. Still I did an auto-launch with the advanced docking computer from an orbiting station locking to a local planetary station. I activated the SCA while in auto-launch. After the auto-launch completed giving me control I aimed the ship to the target destination and hit the FSD. The SCA took over. The good news is that auto-launch and the SCA play well together. They are great when there is no danger. The bad news is that ED has a lot of danger and these cool toys won't help when being attacked. But that is for another thread.
Arriving at the planet the SCA goes into orbit mode and of course the station is on the other side of the planet. Moving the throttle and manually setting up for the landing the SCA still offers suggestions as to get back to orbiting the planet until you get to glide mode. Then I take over and manually land. I ignored the SCA .
So a SCA toggle has to be implemented with the current mechanics of the game without changing the ED universe to make it work. Given our latest greatest September update when something new is added it takes a month to deal with all the new bugs. Given the 5 year history of Frontier updates they never figure out all of them. It reminds me watching the TV series Eureka on Netflix per a technological disaster occurring every week. But we don't have great writers or a Jack Ryan to bail us out. Oh well.
Meanwhile if I lock then unlock a system in the Nav panel it remembers the last page and goes directly to it upon the next access...unless you did other things. There is no scrolling to get back to it. That makes an SCA toggle not all that useful per quickly making an adjustment if the pilot knows what to do. Welcome to the most complicated space game ever created. Well, the Brits making games could never do anything the easy way. Maybe that is why I love them. Enjoy it.
Regards