I'm not sure if this functionality was in other games, but in Dragon's Crown, you can opt to continue adventuring for more reward bonuses if you don't return to town, the only downside is that if you die, you lose everything. I think that something similar would be interesting in FF14 and also it would help mitigate the boredom generated by spamming WP/AK so that a party's rotation might be instead something like :

WP -> AK -> some primal? -> Copperbell -> Pharos -> Hauke -> finish (or finish anytime for less bonus rewards)

I think it would give us a better variety of gameplay experience. Maybe to make it less grindy, it might max out at 3 dungeons.