I don't get it. Your proposal is what you are going to do to graduate in
your current lab. So your adviser has no say in the experiments? Your
committee members are not giving your adviser any face, aren't they? I see
professors' with aims not significantly advance the field in their grants.
Don't feel so bad though. My committee gave me a conditional pass when I
was doing my qualifier.
If you are in one of the top school i.e. Ivy league, it is probably better
to get a master degree and find a job.