Difficulty and length for voyages

An idea for sea of thieves is to have a difficulty and timing for each voyage the higher the difficulty ther faster your emmisary flag goes up and you get a small boost of gold for selling. And time could range from selecting a less than 30 mins to a 3 hour voyage to help you find the perfect voyage difficulty changes could include: more health and damage for order of souls voyages, bigger islands and longer riddles for gold hoarders and animals becoming for scarce and cargo runs being more sensitive so cloths would instantly go to soaked when touching water e.t.c this could be useful for the new ghost ships, making it so on easy difficulty you get less rewards but all ghost cannon balls do less damage and they dont drop mines behind their boats.
Thanks in advance
Bifiankin