I like your routine. I wouldn't mess with it. Once you're in a caloric deficit just keep the loads heavy (as they will be in the 5s). In fact, what I might do is one session of 10s in the morning and one session of 5s in the evening. A little glycogen depletion in the morning may encourage your body to mobilise some extra fat. The heavy evening session will encourage your body to maintain your lean mass.