Curious: Can you still call it a BIG CHOP when you make your goal length?
I know you will still be cutting off a lot of hair, but personally I considered going from my below shoulder length style to a 1 1/2" teeny weeny afro a BIG CHOP...
It doesn't look like you have much shrinkage either. I know you said you pretty much wear your hair in protective styles so that your true length is not seen by the people around you. So...why not take the plunge? Flat iron and wear your hair in a pinned-up (if you can pin up that length) style and go about your day.
I just couldn't deal with the 2 different textures after 3 months...it was too much. My hair was tangling, but it hadn't gotten to the point where it was breaking. I also was ready to get my hands in my natural hair and let those relaxed ends go!
The decision is going to have to come from you. To each his (her) own, right? I notice you have done a few polls relative to permed/natural topics, so you obviously must be fighting with the decision. But you've pretty much put it out there that you have no desire to chop it off.
If I had not stumbled onto this website and consequently your blog, I would have never made the decision myself to NOT TRIM for a year like you. It has been working since I did the BC.
My hair is healthier than it has ever been with the tips you provided.
In the end you should do what's best for you and YOUR hair. You are still an inspiration whatever decision you make.