This seems hopeless. There need to be less tasks, the game resources and hero influences need to decrease dramatically- or costs of everything, including crop count, should increase.
The games start is already way too quick since, the tasks been introduced. The very small tasks prior to 3.2 was perfect (e.g. a field to level 3, lvl 1 of everything etc.). Just a little bit of resources and that's it.
Costs should matter, and resources should be a hard restriction to progress, and decisions you make should matter.
Another disadvantage of tasks is they force a certain game play, reducing freedom of choise, and repressing creativity.
I can't think of a reason why you would introducd tasks. The beauty of the game was it's simplicity. Make updates that are simple, and stay true to it's core. Instant gratification is only fun on the short term, but significantly reduces long term satification.