This is a very good proposal and would allow the ecosystem to move significantly faster.
When it comes to the ‘go to market implementation’ of mini sBTC, I would suggest to strive for one canonical version of mini sBTC with as much Stacked STX directed to it (as opposed to multiple versions). Most builders would expect the ecosystem to set one standard that is sound, rather than having different options to choose from. Having one standard also makes it easier to bring new builders into the ecosystem.
The usefulness of the mini sBTC canonical version will be determined by 1) the amount of stacked STX directed to it and 2) the (non-)restrictiveness of the peg in rules, as we discussed in the Making sBTC ready for DeFi prime time discussion