Maybe I'm just particularly slow, but I don't manage to complete more than 1-2 quests a day in the first week. Whether it's a fetch quest or a clear quest, I always loot the whole POI. I know that is inefficient but I don't care.
Priorities for the first week are finding or building a safe base, getting water and food supplies, setup production and building a horde base for the first few hordes.
Later, I usually build a base for the endgame hordes or expand the first horde base. This usually takes a few days or even weeks, so I don't do any quests during that time. So on average I do one quest a day.
The question is, what would be a fair reward for the amount of effort it takes to clear a T5 POI? At the start of A21, the quest rewards for T4, T5 and T6 were no better than T3. People were complaining. No one was motivated to do higher quests.