Nodes must commit to unmanipulatable, unpredictable randomness when joining thereby sacrificing the ability to control node and endorser selection.
Slashes communication/time requirements resulting in linear scaling for the network
Breakthrough compact signatures support unprecedented efficiency in endorsing blocks. Signatures can easily be created, sent, and checked even by smartphones for each block.
National-lab level crypto secures the network and consensus against emerging quantum computing. Strong xx hash-based cryptography is not the usual government-promoted crypto.