Sounds like everyone else has given you some good advice on your question, so I'm going somewhere else with this. I really don't get how a State agency can offer a conditional surrender. I wasn't aware that there is plea bargaining with TPR. It honestly doesn't make any sense to me.
Adoptive parents and birth parents set up post-adoption boundaries, not the State. How can they enforce or monitor it? I believe that I would some choice thoughts to share with the caseworker or AG who came up with that idea. Either they have a case for TPR or they don't. I would think that this would be very frustrating for you. We foster adopted, and I can at least somewhat empathize with your situation. I hope this works out for the best.