I am generally not in favor of introducing an additional exit option when secondary market exists. However, if this change is necessary to comply with DUNA requirements and presents the only viable solution, I will vote in favor.
Perhaps this isn't feasible, but if 80% of the auction revenue is locked, wouldn't it be desirable to "somehow" lock it as some type of ETH stacking? it doesn't make sense to me to just lock it in an escrow and let it sit there.
Personally, I would appreciate establishing a correlation between the amount streamed and the voting weight. Otherwise "streamed" Nouns votes hold greater weight than non-streamed Nouns, because of the option to cancel the streams which creates leverage I'm not entirely sure we want to inject this into our governance culture.
Additionally, I don't follow why after 1 year only 50% should be streamed. The DAO sells NFTs through the daily auction for member acquisition and to generate revenue. A buyer (not attacker) buys the NFT for at least one out of two motives: inject funds into the DAO and/or purchase a vote. If the vote is not weighted based on the amount streamed, there is good reasoning for the DAO to request to get to 100% streamed as soon as possible.
I'd recommend the stream to be concluded within a season, one year. I'm keen to further elaborate to make my case on this timeframe. It's mainly rooted in governance retention, community engagement and active self-immersion in the ecosystem.