Our devs ... also working with gov agency.
So free NSA-approved backdoor with every wallet?
6) Difficulty re-target every block. It will help alleviating "miner-with-big-rig-leaving" syndrome
But won't help with "one block was luckily found in 10% of expected time and the difficulty now skyrocketed" scenario
our devs are qualified. working with foreign, not nsa. it's open-source code, feel free to check.
also, your second point, there is no short-term solution, but at least block re-targeting will help for Kibble in long-term support. Once a block is found, the diff will drop for less miners