Looks good to me for a general workout plan, I too am on FB routine but its 2x a week because of time constraints and i'm ok with it. I'm at the gym Wed and Sat. You have things covered: hitting chest, shoulders, legs each time so you're see results. Taking 90 sec as you mentioned btw sets is a good idea since FB workouts can be exhausting. I know I'm wiped out after a FB workout.
Only advice is to mix things up, such as, high reps, doing compound exercises, unilateral leg exercises, and abs/core each workout.