Remember that consistency is key, and you may only see little bits of progress at a time. It can take 3 days to a week to see good results.
I agree with you that the more frequent meals are causing more frequent meals, IYKWIM. It's perfectly fine to take baby steps and make changes to the routine 10 minutes at a time. Babies prefer to know what's happening and when, too much change at once can make it confusing to them.
EASAE is fine, btw as long as she's not getting OT.
Re: sleepy signs, every baby is different and sometimes once you see the 'typical' cues, it's too late... here's what I look for: 2nd yawn in a few minutes, becoming more vocal, looking away from me or losing interest in toys. Hungry signs, I always got them confused with sleepy signs at first (same with DD1) so this time I just relied on the clock (ie how many hours since last feed) and if I thought it wasn't time yet for a feed but nothing else would appease her, then I would just feed. Maybe someone else has better ideas, that's just how I did it.
You are doing a great job and seem really tuned in to what your baby needs. The core of BW philosophy is to be able to communicate with your baby by paying attention to their cues and providing them with what they need. There is no exact formula since every babe is different, and once you get them figured out they change some more. So you may never feel like you know what you're doing, but as long as you're always trying to respond to them you're doing great!!