If we assume for a second that you can mod Elite just hypothetically, let's be honest here folks, what do you think the first one would be moded by like 99% of playerbase? I tell you with 100% confidence - FSD. People will make it at least 100 by default for each ship with ability to engineer or boost from there by other means. It's not good that you may be avoiding specific ships, because they have terrible jump range, even with all upgrades applied.
Some people want to feel endless "vastness of space" so they may convince themselves that traveling 15 Ly is okay in 400 billion system game, but others have life and want to get to their destination in comprehensible time. It's not laziness, it's simple convenience and the fact that some of us still view Elite as a game, a past time, one you usually have fun with and don't have to dedicate your life to if you want some progress.
FDev are well aware of that, that's the reason we got FSD engineering, then we are promised 500 Ly jump for Carrier iirc? Tell me, is there ONE long time player who doesn't have G5 FSD engineering unlocked and applied, more often then not with Guardian Booster? I very much doubt it. People grind their souls away to get that stuff, because it's probably the most important upgrade in the entire game.
When you can travel greater distances in shorter time, it doesn't hurt exploration, immersion or anything else, it's just a choice player should be able to have. When I go for exploration trip, I usually Neutron boost to destination I want to explore, be it nebula or specific sector, and inside I travel at minimal Ly to actually explore system. On the way back, I travel at max jump as well. Currently maybe 10% of whole galaxy is explored, which is funny. E-D won't be there forever, and when it reaches end of it's lifecycle, having galaxy explored by maybe 15% would be comic, but what stops people to explore en masse? Crippling jump ranges, so have to spend months with Netflix on background not to simply die of boredom to get anywhere really deep.
Currently Economic jump is a gimmick used maybe very early in the game, or by some extremely niche builds, primarily for testing or screwing around purposes. Feature has no actual efficient aplication whatsoever. Imagine if default jump would be around 100? In Bubble I'm sure, many ships, especially those unequipped with Scoop, like Traders, some Miners/Fighters? Would be travelling at Economic rate, and that would make sense.
If FD makes ARX to be used for jump extension, I'm absolutely positive, they will make fortune on ARX sales in no time. People will complain, but bent for convenience. That's for sure.