I suspect that FD didn't expect the way we use engineering. I think their intention was that G2 or G3 results would usually be enough for us and G5 would usually be an aspiration. They didn't want the end point to be the usual application. This of course utterly failed to take into account human nature!This
I have more than 8500h spread over 3 accounts. I fly FA ON most of the time.
I really rarely fly FA OFF, usually if/when i do old school 1-on-1 with thargoid interceptors or when leaving the station i find that my hyperjump destination is behind the station i just left - in which case as i exit the mailslot i FA OFF, boost straight, wait till i clear the station mass lock, then engage hyperdrive, turn 180, turn FA ON and boost - then the timer is up and i get into hyperspace... Much faster than flying around the station to clear its Mass lock
I do remember when i started on XB - the first session was a real mess with me trying to figure out how to leave the station in the starting Sidewinder.
However, i dont think i would have ever got into it if it was FA OFF from the get go.
I take this as something for the OCD completionists - which i am when i have materials, and i usually always have materials.
And i like it's there as an option.
Design-wise there are two ways to provide diminishing returns from multiple rolls. Either a convergent series which tends to a known limit, or a divergent one which has no limit.
Examples:
1/2 + 1/4 + 1/8 ... = 1
1/2 + 1/3 + 1/4 ... = infinity
The second way could be interesting. Enough engineering could take you to Beagle in one jump, but FD could arrange that it needed more than a lifetime of material collection to achieve.
I think the divergent way would be interesting as it would do away with known cookie-cutter builds; there would be no final step available. I don't think it would end complaints about grind though!
Basically, we'd all be happier using engineering the way it was intended, recognizing the diminishing returns and not obsessing over the last circle. I don't see that happening either though. I don't even do it myself; materials stack up so quickly that I always complete G5 just so I don't feel I'm wasting limpets in future.