From a community viewpoint, I would rather see a larger number of contesting teams than a higher difficulty level. SGOTM5 indicated that the playing style and skill level of the combatants differ a lot (no offense intended). Enough teams managed to win, and some teams had to struggle to do so. It's inevitable that there will be a large spread of finish years, and this span could be reduced with separate difficulty levels, but not necessary. Certain maps will be faster to complete on emperor than on monarch for example. Thus, I don't think separate difficulty levels will make it more "even".
Personally, I would prefer exotic victory metrics. Such as:
o) Earliest win while building at least 10 worldbuilders wonders.
o) Earliest win with at least "pleased" on average of relations with AIs.
o) Earliest win without Galleons as previously suggested.
Such expanded victory conditions would lead to more varied gameplay and strategies compared to the last two succession games, where there was not much variations between the laurel winners.
Personally, I would prefer exotic victory metrics. Such as:
o) Earliest win while building at least 10 world
o) Earliest win with at least "pleased" on average of relations with AIs.
o) Earliest win without Galleons as previously suggested.
Such expanded victory conditions would lead to more varied gameplay and strategies compared to the last two succession games, where there was not much variations between the laurel winners.