Oh, I'm all for innovation here, I just don't see building the financial system back from the ground up as an effective way to innovate.
All the issues you've mentioned aren't issues core to our financial system, they can all be solved through iterative innovation - many countries are solving this, like Poland (which I use as an example cause I live here), which has free instantaneous cashless transactions both for payments and p2p use that work with all banks here (blik, slowly trying to expand to more countries).
Similar systems are in place in many other countries. Open banking standardized APIs have already spread across Europe, etc.
So tldr, no need to redesign the financial system to fix these, just disrupt it a little bit.
All the issues you've mentioned aren't issues core to our financial system, they can all be solved through iterative innovation - many countries are solving this, like Poland (which I use as an example cause I live here), which has free instantaneous cashless transactions both for payments and p2p use that work with all banks here (blik, slowly trying to expand to more countries).
Similar systems are in place in many other countries. Open banking standardized APIs have already spread across Europe, etc.
So tldr, no need to redesign the financial system to fix these, just disrupt it a little bit.