She could just be a hungry baby, and agree with PP she could need a richer milk.
With regards to the 5:00am waking, if she is going back to sleep with the pacci, then it may not be hunger, it may be a habit. If you do not want her to get too hooked on her pacci, you could try offering her water at this wake up, and if she genuinly is not hungry, after a few days she is not going to bother waking up for water.
With regards to the DF - not every lo takes to the dreamfeed, so would just persist clusterfeeding.
HTH
Paula x