Unless you really want the glamour, no, it's not worth making a Zeta if you're going to work on Anima.
As for Anima... well it depends entirely on your job and whether you raid or not. Most likely we'll be able to choose the secondary stats on our weapons later down the line, but currently some of the weapons are best in slot. It's also the only way for people to get a 210 weapon without having to clear A4S.
Oh, sure, there will be better weapons released. But the Anima questline isn't going to end at 210. You'll get to upgrade it, patch after patch, and by the end of Heavensward I'm sure it will be the best weapon available, just like Zeta weapons were, and it will still be good enough to help you in the next expansion.
If you have the time, effort and will to get potentially the best weapon in the game, then by all means, you should work on Anima. If not, well, you can still clear regular content just fine with EX primal or tome-bought weapons.
