I agree 100% with all the PP advice! I think if you can present EASY as a "routine" rather than as a "schedule", it may appeal to your DH more. Also, it is VERY baby-oriented. You are following your baby's cues all day long! You are doing EXACTLY what your baby needs when he/she needs it, so in essence it's a baby-oriented plan. By giving your LO a routine, she knows what to expect. She can then relax. She doesn't need to worry about what comes next! I can almost see my son heave a sigh of relief when we've been out and about and come back home to his familiar "schedule". It's like "Ah, NOW I know what's going on!".
I think even if you put your LO on EASY for a couple of weeks, your DH would come around because he'd see how all of a sudden all her cries made sense, you wouldn't be wondering what the heck she wanted all the time. We put our son on EASY from day one. We were clueless about babies, and knowing that he'd eating an hour ago we knew that he wasn't hungry, so that cry meant something else. Reading Tracy's books, I knew what the sleepy cues were and I never let my son get overtired (or I tried not to!). All these things added up to a VERY easy baby and a lot less crying than we expected from our newborn. When he did cry, we could sort of go through the checklist of what might be wrong based on where we were in our EASY routine - it made everything SO much easier!
In the beginning especially, EASY is definitely not by the clock. When I look back on my logs, I don't think my son did the same thing at the same time 2 days in a row! But, he was eating every 3 hours essentially, napping after brief activity (NOT after eating), and that has meant that I never had to break him of the habit of needing a bottle to go to sleep. I can't tell you how much that means now that he's nearly 6 months old! Like I said, if you can get your DH to try it for a couple of weeks even, he'll see that you're not going by the clock - you're going by your baby. And you're teaching her things that will be so valuable later on and will eliminate the necessity of things like "cry-it-out" solutions to sleep, etc. Don't let him make you feel like you are doing something wrong! You are teaching your child valuable lessons that will really pay off down the road, even just a few weeks down the road! Even other moms might hassle you about this "schedule" thing (I know I've gotten a lot of flack), but when you're the only mom you know sleeping through the night at 12 weeks, it will be your turn to have the last laugh!