Maybe instead of small pad only stations, which would be an odd 'addition' to the game now, how about places where only small ships fit?
See, this is something where I think FDev sometimes underestimate the players.
They seem to think they need to "explain" everything in context of when it happens.
I don't think that's necessary.
I doubt many (if any?) players would complain about "retcon" as long as the new feature provided interesting new gameplay.
Would anybody be upset if, say, every surface-outpost in every low-tech system suddenly became small-pad only, if it meant there was new gameplay whereby delivering stuff to that outpost would allow it to grow into a medium-pad and then large-pad outpost
and get improved facilities (market, shipyard, outfitting, IF etc) with each upgrade?
How about if certain systems suddenly changed their laws so that you could only
legally fly small ships?
That'd give players chance to build small ships for whatever tasks were available in that system
and it'd create gameplay for outlaws/smugglers who could operate large ships in those systems illegally.
By way of example, let's say there's a system where there's a a mining/extraction economy.
Maybe they're mining LTDs or precious metals in that system and they think the best way to protect their interests is to ban medium or large ships from the system.
The system would offer an elevated number of missions related to mining valuable stuff, transporting it, recovering it and protecting it... all in small ships.
That all sounds fairly plausible to me, and it'd create a heap of gameplay specifically for small ships
and it'd create a target for outlaws in big ships.
Wings of Vipers and iCouriers transporting LTDs vs an outlaw in a Corvette? Sounds like fun to me.