I have a DS that will be 8 weeks old this week and he has been on a 4 hour EASY since he was born. I also have trouble keeping him awake once I have fed him and he also wakes 1 or 2 times a night (2 most nights). He generally takes a full feed the first time he wakes up and only about 2 or 3 oz. the second time. I tried cluster feeding once, but he only took .5 oz. after 2 hours so I never tried again after that. He takes anywhere from 3 to 6 oz. every 4 hours.
I was think about moving to a 3 hour EASY to get him to take in more calories during the day so the night wakings would stop but am afraid that he will not take a full feed after only 3 hours and I will just have wreaked havoc on his schedule for nothing.
Have you tried moving to the 3 or 3 1/2 hour EASY? If so, I would love to know how it is working out for you!!! Good luck and if you find something that works for you, please keep me posted.