I like the idea of missions, yet i think they can be improved
My suggestion is to have the option of automated/simulated runs;
After fitting your ship, you specify for the available missions you want to run a tactical profile.
Parameters would be things like payout vs survivability
If you choose max payout your ship has a higher chance of taking damage (lowering survivability)
The safest settings will run the mission like a pro, however rewards are kept to a minimum
Results can be instant or with a short delay (a few minutes perhaps)
The time for mission complete could also be a parameter
Revamping missions would likely tie up every resource CCP has for a couple of years and most of the players who run missions would complain bitterly - they want predictable, farmable content - “cashflow for capsuleers”