This change would make the game a little more varied and diverse so that we can have different things to do in the day.
The difficulty of the missions can vary between different things like: destroy 30 structures, create a legendary item, etc...
the number of missions can be from 5 to 7, not counting the final reward for completing the others.
depending on the difficulty of the mission dependent on how good the reward is.
The rewards for normal missions can be: 1 Rare Kit, 1 Epic Kit, 5,000 - 10,000 Coins, 15-30 Fuel, 5 - 8 Tokens, and 25-30 Guild Coins.
Final quest rewards can be: 20,000 - 30,000 Coins, 10-12 Tokens, or 100 Guild Coins.
This all varies depending on the difficulty of the missions, but it can be a fun idea.