decentralization, why not to implement these ideas in the initial release and stabilize their
design? Such a change will be more difficult once the product is released. Probably it is
because there is no agreement on one PoS design and many PoS versions are being
proposed. Thus, their announcement shows that they are aware that their consensus solution is not optimal and that they want to wait until the most acceptable version of PoS will surface.
Anonymity
Libra mentions:
“The Libra Blockchain is pseudonymous and allows users to hold one or more
addresses that are not linked to their real-world identity.”
This means that they will not try to solve the problem of unique identity for users, but will go in the direction of existing public crypto-networks: de facto anonymity.
Technically this is implied by their use of smart contracts. That is, smart contracts are uniquely identifiable, but their users are not. The inability to exchange data among uniquely identified users off the blockchain will cause space restrictions and higher cost for their blockchain, as with other crypto network implementations.