Hi MariaC,
It's great to be in touch w/ another first time mum!! My lo is 4mths and has been on the easy since a few wks after her birth. She just recently transitioned to a 4 hr routine.
While I did go along w/ the book, there were a few things that I didn't do- eg. instead of dreamfeeding when baby's supposed to be sleeping, I actually woke mine up around 11.15pm to change, feed and put straight to bed. It worked just fine! In the first month and half, she was waking up between 4-5am for a feed and then sleeping til half 7. After a while tho, she preferred to sleep rather than eat in that wee hr so I just gave her the paci which would keep her sleeping til anywhere between 7-8am. So for a while I didn't stick to the 7am wake up. But since she was 3.5mths, she's been waking at 7am or just before so it's just worked out that way. She still stirs and makes noises around 5am or so but once the paci is in her mouth, she settles again. And even if she's still sleeping, I will wake her up to keep the consistency going (and also to instill the habit). She goes to bed by 7pm each night (6.30pm if she's too tired), even if I do her last feed less than 4 hrs from the afternoon one. If all goes well w/ her eating and sleeping habits, she should eventually be able to make that 12hr sleep stretch w/out the dreamfeed and that's what I'm aiming for.
In your case, you're already on a routine, albeit not totally the easy one and I think that eventually, your lo will be able to sleep thru til 7am w/out being fed in the wee hrs just like mine. And that's probably when the actual easy routine will kick in. If your baby is happy w/ the current routine and you're comfortable w/ it, then there's no reason to wake him up earlier. The great thing about bw is that it's flexible and I think the idea is just to get mothers on a routine so that things are a lot easier for us!
Hope this barrage of info was useful for you!