Now, let me ask you this, at 42.5 hours per weapon under your numbers, as someone who might have 2-3 hours a day every other day, does the prospect of spending 30-44 days over time toward a single weapon strike you as both productive and entertaining? Especially in a game with so many other odds and ends to chase? That 30-44 also only works if they happen to be on for the specific elemental days for trials where weather simply isn't an option.If you add up all the time spent (getting to camp, resting, waiting on pops, etc) and it comes to an average of say 2 minutes a kill--it will still take 2550 minutes to kill 1275 monsters to complete that line under the same setup and condtiions.
See, magian trials are a pretty important part of the game right now. If a player feels so desperately overwhelmed by an endeavor, then they'll be less inclined to undertake it, which can lead to less interest in the game, and eventually a loss of a customer to SE. Brush it off as me making a mountain out of molehill or how that's simply their problem, but keep in mind the MMO genre walks a fine line between entertainment and feeling like a job with crappy pay. When this happens enough, we find ourselves with fewer people to play with, the need and hassle of server merges, and so on. Day/Weather restrictions are just one part of the Magian blah, but still an important branch. Hopefully the hinted adjustments in the coming patch might address some of this, but if not, I still don't think it's an issue to ignore.