Ah - gotcha. This guide / setup is much more geared towards maintaining color consistency between a Rec709 workflow within an ACES pipeline / delivery, so that the colorist ultimately sees what we see.
I’m not sure how deep AE will really go in terms of maximizing ACES - outside of the regular blending mode / blurs you can get at 32bpc. Especially if you’re working on a regular SDR monitor.