While I agree with the general purpose of the proposal, I highly doubt it will function as intended.
There simply is no possible method that could audit enough prior data pieces to ensure a node that has been disqualified could safely reenter the network. A full audit of all data would take a very long time. A node which voluntarily pays to remain in the network would lose funds rather than earning funds.
The current system functions fairly well for both sides… even if a long running node loses the escrow payment… because a node that pays to remain would be paying more than the escrow anyway.