This is really good feedback. Thank you on all points!
I do see the issue with potential for spam on weekends. If there are no exchange rate proposals, no routine business proposals (e.g. subnet updates), and no register known neuron proposals, then there is likely an incentive for 1 spam proposal. TBH I think people will catch on pretty quickly that weekends are the time to submit register known neuron proposals, which will make it pointless to spam. I’d even offer to make the register known neuron proposals for anyone who wants to pursue it so we lower the barrier to entry on submitting that proposal. 