Indeed, I think legacy paths should involve more than just “unlock technology/civic X,” “build Y,” or “send missionaries to convert Z and gain a relic.” That’s the problem with scripting.In Exploration, I actually find the Economic victory path to be much more engaging than science (place specialists) and culture (micro manage missionaries and click an action button).
I know there are issues with the treasure fleets with map generation especially; but it’s obvious that more of the budget/energy went into its development than other paths in Exploration.
I like the science path during the Exploration era, but it’s far too easy. The culture path is by far the least engaging for me, since not only is it overly easy, but also uninspiring, as it involves almost no real strategy—just sending missionaries to certain places to obtain relics from their conversions, then building temples to house them, and that’s it.
Alternate idea: the need to accumulate prestige of a powerful empire via doing certain diplomatic actions or just being big and mighty.