It is really mystifying why Fire weather was designed to occur so rarely in the first place. With these geode trials, there is no excuse for this to still be the case unless this development team is actively pandering to the professional endgamers who don't want their "inferiors" having weapons that come close to or matches the performance of the weapons the "worked so hard" for (i.e. knew the right behinds to kiss, exploited the right gil fountains before they were shut down, etc.).
The drop rate by day needs to be dramatically increased to draw even with weather drop rates. This may at least partially address the needless rarity of Flame Geodes and, in turn, make Fire/STR weapons less expensive to build (Which had never been a consideration for Magian Trials until a certain someone decided that the have-mores aren't special enough post-Abyssea).