I agree with PP that if your schedule seems to be working for you and your LO, and you are following baby's cues, there is no need to make changes.
If you feel some changes are necessary, I might suggest: a) taking out 9am milk and possibly b) upping the ounces in her bottles, maybe 6-7oz?
Once babies are on a 4 hour EASY, most are getting milk/formula 4 x's in the day, and possibly a DF or night feed. At 6 months, my DD's routine looked like this:
7am wake and BF
8am cereal
11am BF
12pm veggies or fruit
3pm BF
5pm cereal, veggies, meat
7pm BF and bed, with no DF or night feed