Congrats on the Casady!! I`ve been wanting one for a while,so I`m a bit envious!
Like others have said a wider strap made of leather with help with neck dive. Another way to beat neck dive while playing is to have your instrument cord looped thru your strap. This is what I do and not only is it good for weighing your bass down but it also prevents you from yanking your cord out of the output jack if you step on it.
Fuzzrocious#59,Mediocre Bassist Club #269 Gnomeratron VTF#22
Hollowbody Bass Club # 323 ,Fretless Fender Club #5,Fender Bassman#19,Gibson Club#253