HI Shane, I have post a bit about Substance in this post if you want to dig a bit.
To answer your question, if you are happy with your workflow, I guess you can go on with it. Even if you should be aware of a couple of things (that you probably already know).
As you know, Substance does not support any OCIO and the suggested workflow currently is to use a display LUT simulating the ACES look.
What surprises me a bit with your workflow is that you manually convert to linear in Nuke but write it as an ACEScg file…
Have you tried to load your texture in your renderer with the IDT “Utility - sRGB - texture” ? It should do the same thing but avoid the manual conversion in Nuke…
My tuppence,
Chris