The only thing I'd say is that in the coming patches over the next few months Synthweaving and other professions might receive more patterns or changes to make them more useful at max level. If you're patient and planning on staying around for a while there is no reason to change.
That said, leveling professions isn't too difficult in this game so it wouldn't be hard to drop something for Biochem and then drop Biochem later for something else if that is more appealing down the road.
This is my main reason for having second thoughts. Seems like the other crafting skills will have to get buffed or biochem nerfed again. So maybe it's worth waiting. But as it is now, I have yet to see a good argument against biochem.