No, I didn't miss your post. I just didn't feel there was anything else I could add, and "ultimately only you can decide" was a response to your questions. However...
(which will make her day 13hrs long not 11hr like was suggested at the beginning of the thread)
A lot has been said since the start of the thread. You have provided a lot of information regarding nap length, day length, night length and what she will do in certain routines and what she *can't do* which has been taken on board by those supporting you so that we can make suggestions based on:
a) the information you give us
b) something that has not yet been tried
What if with 8 pm BT and no nap she consistently wakes very early
Honey there are a zillion "what ifs". What if she sleeps 14hrs and really surprises you and you are up all night worried about her sleep so don't take advantage of that HUGE sleep you could have just got for yourself?
I have no crystal ball and I have no idea what will happen today, tomorrow, next week or even in 5 mins. That's the truth of it.
I really think all that can be said has been said. Everyone has put what they think, their changing thoughts, and offered ideas (and even answered a few "what ifs" along the way). And now, it is for you to decide. You are her Mummy, you are the best ever Mummy she will ever ever have. You *can* do this. You *can* decide what to do next.
If it helps re-read the thread, make notes, write a plan, stick it on the fridge.