Luke-Jr what is your opinion regarding the pull request offered by Peter Todd?
He has 5 pull requests open, none of which seem relevant to this discussion.
Miners could still still make their decision on whether they wish to include such transactions in a block and Counterparty would use pruneable blockchain space.
Blockchain space is never prunable. Only UTXO space.
I don't know if it has been created yet. Please see: