Let's face it, I'm a wasteful spender. I've given missions several 5* weapons just to get that big Prestige increase. Now that Three rings has actually given us some incentive to throw money at our e-peens maybe we should get the option to choose how much of a fistful we want to throw!
The suggestion is simple: allow us to decide what star rank item we want to turn in. An example would be for tomorrow: I have to turn in a Blighted Bone, a 4-star material. It would be super keen if I could instead opt-in to turning in a Reaper Rib instead for the higher Prestige payout. If we don't feel like giving up our precious Blighted Bone or Reaper Rib, we could opt-in to a lower-ranked item for their lower payout.
The same system, of course, could be implemented to the supply delivery mission and arms appropriation mission.
I'm quite sure the arms appropriation suggestion was mentioned somewhere before; but I'm waay too lazy to dig it up. No pun intended.
My main objection to this is that it'll make Prestige a little too easy to get.
That being said, my suggestion is that this can be done; but you incur a 50% prestige penalty on that respective reward for not handing in the 'right' weapon, though. This way you avoid people 'powerlevelling' their prestige too easily.
Here's an example. Suppose you have to turn in a Sudaruska for 300 prestige.
While the easy way out would simply be to turn in a Kamarin or Khorovod, you would not get 150 or 180 prestige respectively, but you'll get 75 or 90.
This discourages players from taking the 'easy way out' for such missions.
As for materials, nah, leave it as it is. The AH is way too convenient anyway; that and it'd be tough to calculate the reduced payouts if 2 or 3 materials are involved.