Well, the LCU will restore it sooner or later. The Certificates is soul of Windows, isn't it? Let's wait for Applegame12345's good news.
Nowadays is the soul of everything, find a way to edit a certificate at your will and you can become rich overnight and/or destroy the world economy in a week
Well, the 19041.1 CMGE in not-supported language just got a big BSOD with LCU installed. Microsoft always renew Certificates to my best knowledge, especially when an SAC SKU is about to reach end of service.
Renewed or not a broken certificates breaks the whole chain of something relying on it. The only ways to modify it is having a leaked private key, or a big bug/hole on the infrastructure used to generate it, or an alien computer billion of times faster than what we have today.
Interesting idea, indeed. Probably the good old filters from win8.1 embedded are even better (I ported them on win10 and are working very well.)
Next Quick Switch task is to get online updates working... on Professional & EnterpriseS, update Professiona first, than switch to EnterpriseS and update.
If, 1. you used SKU mum in non-original structure, I'm afraid not. 2. you modified some file, the dism /get-currentedition command should fail to show correct Product name if LCU has update for the file. Perhaps you have better solution. Go for it.