Do not please try to change these two myths. BAL has only these two things as its political capital. So, BAL will not accept anything else.
There was a time when the then PM Khaleda Zia of BNP proposed surveying throughout the country to know the names of those killed and compile the number killed.
This Hasina Bibi staged a continuous street demonstration and said no one should contest the claims made by Sk. Mujib. Begum Zia failed in her efforts.
It is the two legs the BAL and Hasina stand on. Once she is gone, perhaps a future government will be willing to look into it, so the documents from that era should be preserved in anticipation of that effort.