Sounds reasonable to me! That's the great thing about EASY, it gives you a basic structure but has loads of inbuilt flexibility. Aside from feed times (currently every 3-3.5 hours), I more-or-less follow her lead with the timing/duration of A and S. She plays until she is tired (when she starts to get grumpy and disinterested anyway) and then has a nap.
By letting her "sort out the details", as it were, she has a routine that she is happy with and has no problem following. We do have the odd hiccough though