So if we make them "standard", we should loose the extra slots that was added when these modules where added... you now have fixed modules in those slots, that you no longer are able to change....Some choices are good - some are bad.
Example of a good choice. Gimbaled vs fixed weapons offer an interesting trade-off. Fixed weapons are harder to hit with and require more skill to use, but do more damage.
Supercruise assist does nothing but make the game less tedious. My choice is between making my ship a bit less capable or enduring more tedium. Not to mention features like SCA are often a must for players who have a family and a career. For better or worse I can't always just pause the game (which is why this is pretty much the only non single player game I play at all). If SCA actually made you arrive sooner/faster then we might have some sort of semi-interesting tradeoff (although I still think any gating/negative consequences for using the automation itself is terrible game design)
And the problem with your example of using SCA for doing family stuff during gameplay, is that regardless of what you are doing, some NPC could interdict you... and if you had any cargo, and the NPC was a pirate, and you do not comply with the release x amount of cargo, you come back to the rebuy screen. And if you use headphones you are even less likely to get any audio cue that this happening..
From my own experience using SCA it is mostly a niche feature, as it will only fly in a straight line and slower than what you can fly, (unless they made some changes in Odyssey).
ADC on the other hand can be quite useful, as you do family stuff either docking or undocking, and you will be reasonably safe from harm, and yet the docking computer can mess up, and get you stuck etc. it is a risk. So you will either be docked and ready doing your station business, or be undocked and ready to continue your journey to your next destination.
And for this, every ships got one EXTRA slot for players to choose which module we might want to use, and small ships got TWO extra slots. So we got more slots to allow us to use these modules without having to rework our existing builds. And many choosed to use these slots for other purposes. which is perfectly fine, but if you use these slots for OTHER purposes and then complain that you cannot fit these modules, then you missing the point of why these slots where added.
And the previous mention about DSS, with that module, we did not get an extra slot for it.
So on to the suggestion, combining into two modules, that makes little sense, sounds more like another suggestion to give more module slots...
For owners of Beluga, Corvette and Cutter owners, these will be upset that they do not have any Size 2 slots! so they would have to "waste" a size 3 slot for this. just like how back then had all the threads about Discovery Scanner etc, on these bigger ships that only had a Size 3 as their smallest slots...
All ships would gain one extra free slot, if they use both modules. So should we remove one size slot from all ships then? otherwise, we could just ADD a second size 1 slot to all ships, and we would get the same effect!