I looted a pair of daemon bone legs an when i tried them on i take a dex hit. I thought theyd be like normal bone armor an not have a dex it is this intended or a mistake? Thanks in advance
That's a "rare" item. Likely the model is based on old code. While you certainly may, I am sure it wasn't meant for anyone to wear as actual field armor.
I think this is a bug. But at least at one time, Daemon Bone armor had more AR than plain bone armor or even "exceptional" bone armor as well. If that's the case, maybe correcting will take a little longer (ensuring balance, etc.), but I suspect there would ultimately be no issue with fixing this even if daemon bone continues to carry it's extra bonuses. It's still inferior to invulnerable bone and less numerous as well.
I imagine it's cheaper to assemble a set of barbed bone armor (47 AR with barbed gorget) if you're really wanting bone with no dex loss. I would say the daemon amor dex loss is a bug though. I believe Phoenix armor used to have dex loss as well, but I am pretty sure that was patched out.