Dragoons: A Rotation Reborn

[Thendiel]

Did anything change about the absolute BiS Non-Crafted Set now that Longinus Zeta is out?
I'm speaking about this Set here: http://ffxiv.ariyala.com/OEMD

Yep. The det/crit Longinus Zeta has now definitely replaced the Dreadwyrm Spear as the sole BiS weapon for dragoons. This is an updated non-crafted BiS listing for 535 accuracy. These are my updated, non-crafted BiS listings at all relevant levels of accuracy. I've also updated that page to emphasize Dervy's crafted sets a bit more.

Mine would be a full Crit and Det Setup for the Weapon and I was wondering if the Stat Weights will be any different on that BiS when switching out the Weapon or if it still stays the strongest Non-Crafted BiS?

It sounds like you're asking whether the Zeta has to be full crit/det for BiS or if it should have slightly different secondary stats (like perhaps a little accuracy to balance out the gear set). If that's what you mean, then basically, Ariyala's isn't sophisticated enough to say. Even if Ariyala's could figure this out, it might lead to awkward conclusions, like, "meld full crit/det for 505 accuracy BiS, but meld 12 points of accuracy onto your Zeta for 535 accuracy BiS." For the sake of simplicity and sanity, it's safe to assume that your Zeta should just have maximum det/crit.