MLEE: I did switch DD to a 4 hour easy, and she does great now on it. She was like yours for about 2 weeks, and since i switched her everything has been so much easier, shes eating 4-5 ounces every 4 hours, shes also on solids, once a day for breakfast. She also has been sleeping A TON better, she only wakes up once instead of 2 or 3 times. I hope everything has worked out for you!