Currently formulated (as appears in the summary usefully provided by Aurelius), crafting output is likely to be impacted by main/sub tool and craft level. It is also a function of time spent on an actual synthesis.
I'm not sure I like this all that much. What if I was an RMT who was running multiple accounts of ffxiv simultaneously?
All I would do is concentrate on getting high-end materials from AH or its equivalent, then set a few DoH characters on slow but HQ and valuable recipes (so I could go afk on those accounts), while I take my DoL/DoM characters with a token DoH character along to harvest a specific crafting/battle guildleve for similarly rare ingredients. It sounds like an RMT company's wet dream.
Oh well, there's always going to be a tension between catering to the server population vs the exploitation of the server's population.