If the "mirror" isn't definitive, I don't see how this saves any work and it definitely adds a lot.
For example, to handle transfer restrictions and lockups, the founder "can configure the smart contract for the mirrortable through the platform's interface to implement various kinds of restrictions in the on-chain mirrorshares". So, in addition to working with the lawyers to add the restrictions to the legal docs, she also has to then create a smart contract duplicating this. And, if the angel tries to sell shares and the smart contract allows it, she can't rely on this as it maybe a bug, so she still has to dig through the original docs she signed.
For example, to handle transfer restrictions and lockups, the founder "can configure the smart contract for the mirrortable through the platform's interface to implement various kinds of restrictions in the on-chain mirrorshares". So, in addition to working with the lawyers to add the restrictions to the legal docs, she also has to then create a smart contract duplicating this. And, if the angel tries to sell shares and the smart contract allows it, she can't rely on this as it maybe a bug, so she still has to dig through the original docs she signed.
How does this help anyone?