When doing a QDRO, with accounts invested in risky stocks the parties should agree to split the shares. If the market goes up between the time it's decreed and the QDRO, they both win, if it goes down, they both lose. Completely fair to both parties.
You cannot guarantee no delays in EVERY case. It's impossible.
We've been through this before. Maybe if you take your fingers out of your ears....
No one said one could guarantee NO DELAYS. That's your silly straw man argument.
Your suggestion basically doubles transaction fees - which doesn't help anyone. More importantly, yours still creates the potential for someone to get a lousy deal.
One example: I am an aggressive stock investor and invest in some relatively risky stocks. My ex wife is extremely conservative and given the choice would only be in safe mutual funds and bonds.
We divorced in 2007. She got her share of my 401K in cash rolled over to her IRA. She was then free to invest it however she wished - and she mostly invested it conservatively. Her portfolio dropped less during the worst of the recession than I did. Your argument is that even if it took us 2 years for the shares to transfer that it would have been fair for her because she got half of the stock. In reality, it would have been very unfair because she would have suffered with an investment strategy that she didn't choose.
For all the reasons above and which I've explained before, the first priority should be for QDROs to be transferred as quickly as possible. Accepting delays on the basis of your argument that it's OK because the percentage is the same no matter what happens to the shares is just plain wrong.
Beyond that, transferring the shares in cash means that the transaction costs are borne by both parties rather than forcing only the recipient to pay them - and doubly pay them, as well.