If it's so taxing to make a fire trial weapon why don't you make a different type? Others have mentioned how you can farm the geodes if you're so set on finishing one. Even if you're only able to get 1 each firesday you farm, that's only 55 hours of work and it's scattered over a period of time. If you farm a mob that also drops gil or another sellable item, you're increasing your efficiency and expanding your options. It really should not be difficult to finish the trial if you put some effort into it.
If you're complaining about doing the geode trial multiple times, you'll get no sympathy from me.
The rep has already pretty much told you the fire weather won't be changed. The design of the expansion's zones are most likely complete by this point, so asking for extra fire weather is pointless (that's not to say they didn't already build some of those zones in already).
The person who asked why it would affect people negatively if the drop rate was increased... Yeah, the only reason I can think of someone seriously asking that question would be if they joined after abyssea or if they somehow never looked at the market.