I initially didn't plan on including a comment about your rewards being to high. Those numbers are just placeholders to me but some like to discuss them or use them as a starting point so I can understand why you included them. I'm operating more with the goal to improve on what we currently have and the end reward is just one factor for that.
Some posts here seem to suggest rare cargo items (or generally items of different values) to be introduced into the pool, which I think is a good idea.
You could also track the net distance one needs to sail to deliver them and reward accordingly.
Back to raising the rewards to whatever amount. Yeah that might work. It might also not. Athenas are fairly time consuming so I understand if people choose to shorten them a little by neglecting the cargo runs. But that is rather an issue of being 'forced' to do them. So in that scenario you could raise the rewards to whatever you like, they might still be left (or at least might end up being not delivered) because here the 'goal' is the chest of legends and not how you can earn the most gold in any given timeframe.
I would like to see more variety to the available quest types as well as more variety in how every single quest of one type can unfold. I hope that is A possible and B comes with the quest update (or at least a first step in that direction). So that is what I'm here for.
About reposting being a problem. Don't know about that, you have to ask a moderator for that. I suggested it because it should be easier to find it in the mega thread (should, we might need some adjustments to the forum to make that happen) and have a more directed discussion over there (although this one seems to be going well). And also there are a lot of our suggestions already posted over there but the discussion just stopped at some point. I'm glad someone brought it back up. I would rather discuss these topics as opposed to what we are currently arguing about.