I have not had a UC. I will comment anyways. I am supportive of UC, and have considered it myself. I understand this is a forum for those supporting UC, but I don't read that you are looking to be convinced to UC anyways, but rather for support of your need to change your UC plans.
I was planning a HB with DD, who was born very quickly and unexpectedly at 27 weeks (infection, possibly leading to abruption). With your significant abruption at 25 weeks, anything could happen- totally normal birth at term, or every intervention needed for a birth tomorrow (of course we all could say that about any pregnancy; mine was 100% low risk until I basically walked thru the door fully dilated). I like to think that attachment parenting means being present with yourself and your child to do what is needed, not what your preconceived ideas were, or what other people say you should do, or whatever- but listening to your child and responding. Being flexible is a part of that. This is a sacred journey regardless of the road you are traveling on. A component of being sacred is deserving respect. For how huge, unexpected, life-altering it is, and we don't get to choose the details. Yes, you will have to advocate for yourself, and you need to start planing that now. Know the "routine procedures" and how you want that handled. Some hospitals are awful- but lots of them aren't. Some are really really good. Don't assume it will be an adversarial relationship- start from the view point as you are all a team working together, you are not forcing them into things they aren't comfortable with and they aren't forcing you into things you aren't comfortable with, and then bring out the fierce protective instincts if needed. Like, what does "forced c-section" mean in your mind? Or to flip that, what would feel like a good justification for a c-section? What would your role be as a member of the team that decides on a c-section? You have only part of a functioning placenta. This is a very real possibility. A placenta that does well during pregnancy may not fare as well once labor starts. What is a time when you feel comfortable going in, in labor? When does your team feel comfortable with it? What would help you bring your expectations closer (i.e., what would make you feel better about going in earlier in labor, or make them feel better about you being at home longer?).
And don't fear the bonding issue. That bond is sacred in a way that is deeper, but also more complex, than the immediate hours after birth. DD was on fentanyl for a week, we couldn't hold her for even longer, couldn't even be cradled while being fed (once she started that months later…) etc. My husband was bonded to her the instant he saw her. It was more complex for me, not in a bad way per say, but in a way that I think again emphasizes the sacredness and respect of this- I was perhaps in awe of her, and respected her, and as I got to know her, became as bonded as any mother, and I think something even deeper.
We shouldn't avoid things we know are needed based on fear (in whatever way we "know" things or "need" things- from reading your post it sounds like you "know" this is the right choice for your situation). Fear of birthing at home, fear of birthing in a hospital- neither is helpful, except that fear tells us it is something to be respected and to pay attention to and prepare for.