I think that just CPline then EO is better, maybe instead of tracking CP while doing EO, tracking EO while doing CP is a better Idea.
I've tried this out--tracking EO while doing CPFB is harder than you'd think (you have to keep track of 11 pieces + where the centers are over the course of ~11 moves), and if you don't track EO then the recognition seems difficult.
I break down the advantages and disadvantages of this variant in my original post a while back up in this thread, read that pls