Exciting research overall and the big picture is crystal clear, but from what I understand the choice of the actual update rule for dynamic pricing is not justified very well. For this specific proposed formula, I have an attack in which a small number of users with only 10% of transaction volume can halve the price in less than 1000 blocks only by a particular timing for broadcasting their transactions.
https://github.com/zcash/zcash/issues/3473#issuecomment-475642877
https://github.com/zcash/zcash/issues/3473#issuecomment-476308282
https://github.com/zcash/zcash/issues/3473#issuecomment-479625462
https://github.com/zcash/zcash/issues/3473#issuecomment-479684321
https://github.com/zcash/zcash/issues/3473#issuecomment-481525852