Here is my one system-based complaint about FFXI:
Synthing ore into nuggets requires fire crystals. Fire crystals are almost impossible to get. Therefore, mining is worthless, because nobody has any use for your ore. Blacksmithing is also very difficult to start out, because the most cost effective way to start a craft is to harvet the materials and then synth them yourself. But for blacksmithing, all the basic synths require unobtainium fire crystals, so that's not gonna happen.
SE needs to fix this! Either make fire crystals more common, or let us synth fire shards into fire crystals, or something! This is a MAJOR balance issue with a really important craft!