The weathers all run in cycles according to the Vana'diel seasons is all. I myself am currently waiting for this coming Weds/Thurs for the coming summer months and more frequent fire weather so that I can get to work on my STR dagger. All it takes is a little planning and calculations and you can set aside the right time for you to get your weather/day of choice. Just because the system is time consuming doesn't mean its broken. The whole game is designed to be needlessly excessive. Would I like more frequent weather, sure. But I'm not going to hold my breath on the matter.