I disagree with you. Once upon a time mystery chest dropped only “old” (non-weather) bonuses. Then after the weather bonuses were introduced, it became significantly less probable to get Family Ticket or Alarm Clock or Golden Wrench etc. from the chest. Now we will receive those useful bonuses more frequently.About the bonus removed from mystery chest...
It’s a pity that old barometer and shaman drum are removed from this mystery chest. They’re much more interesting than the Chinese lantern (which is kept on the chest). Using either one is a quick way of getting rid of an unfavorable weather condition in a specific flight.
On the other thought, i use now and then a weather related bonus only when I have to fly some flights within a certain time limit and I get longer flight time due to the weather. Otherwise you can always produce a wether item in your metro lab and can fly any flight with bad weather.