I have never been sure that birth ties are correct, the fact that we can prematurely destroy them using programming techniques but not a sysvars, making that option so infinitely unlikely to be evolved by evo bots, has never seemed the right approach IMO. (A marked distinction between combat and evo bots)
I would prefer something like transmission of body/nrg being the reason for the birth ties existance, although I understand that there are biological reasons for it being this way.
To my mind transferance of information to offspring is no different to the transfer of genetic information, I am not aware of biological comparisons for educating offspring in this way.
Do as you feel fit, you have my agreement for any changes.