The DHF may run as it is without inflows from network issuance. One thing I would change the system is the ability to vote against individual proposals which will do away with the less flexible return proposal that is expiring in 4 years and will cost $3,730 HBD to recreate today. Creating a VC fund (if it isn't just a VSC contract akin to Protocol Guild) means establishing a legal entity that has its own cost overhead to operate and is also a foundation which is bad idea.
Dissolution of valueplan would make these arbitrary numbers irrelevant anyway.