Hi Aesthetica,
If only we had the benefit of hindsight when we are going through the difficult times! I know how you feel, with my DD I am going through a very similar thing:
to bed in the hammock happily then co-sleeping with me after the first feed successfully for the first 6 months
getting grumpy in the hammock at about 6 months and beginning a sleeping cycle of waking up to hourly for feeds
now back to 2/3 feeds at night but sometimes quite vocal when she wakes up and quite a protester when I put her down leading me to consider that she doesn't like the hammock
However, I have persevered with the hammock and it appears to me (there is that hindsight benefit!) That her trouble was more about changing sleep patterns that lots of babies apparently go through at this age, and about me letting her develop an attachment for the boob to settle rather than a dislike for her hammock.
We are now over the worst of her night time disruptions (I hope!) at least it is not as bad as it once was. She seems to sleep so soundly and cosily between wakes in the hammock and I, like you, don't really dig the idea of a cot. So based on my experience.... I suggest that if believe in the hammock, keep it up. HTH
Sorry, did I mention she is 8 months now... so same as you pretty much!
Bookmarks