Is that during prime time Bufkus? I play on Balmung too, and just got 50 weaving a couple days ago. I completed botany luminary first so I had the convenience of an obscene amount of flax that I may not have gotten had I not heard guildmates complain about fleece. I play from Australia so my times may vary but it's rare to see sheep packs up even during the America's offpeak hours. Before it was merged with Balmung, Besaid was the roleplaying realm, and a number of latin American groups chose the server too. Beyond that I have no idea of it would be so bad, or what groups played on Balmung pre-merge.

My advice is get about a stack and a half of fleece and use that for quest items/first craft bonus (I made the lv 50 quest items at 49.) With the amount of time you have to put in to farm a decent amount of fleece, you're still going to be pulling your hair over the lack of hq fleece drops, with botany you can 'force' hq drops, and make in-roads to the botany luminary. I know that doesn't appeal to many people since it's the same as the 50quest one, but it's there.