@Souptacular, thank you for all the research and thinking that went into this solid, well-presented analysis!
A few quick notes:
Blocktown Development Fund Proposal: 10% to a 2-of-3 multisig with community involved Third Entity has a Dev Fund of just 10% in total, which is half of most other proposals, and arguably inadequate at current coin prices.
Decentralizing the Dev Fee was updated last night to from 25:25:50 to 35:25:40, similarly to Dev Fund to ECC + Zfnd + Major Grants. There remains the difference in what the percentages mean: the former has 35% to ECC as an upper bound, whereas the latter has 35% as a lower bound (ECC can also apply for grants from the 40% slice, though new players are given preference).
About Dev Fund to ECC + Zfnd + Major Grants, you said:
The reason it doesn’t beat Blocktown’s proposal is because I am not sure the exclusivity clause for the principal developer would work for the ECC as they may want the flexibility to mature into an organization beyond specifically Zcash
There is no exclusivity requirement in this proposal. ECC is free to do other work, as long as those expenses are not paid for by the Dev Fund. ECC just needs to disclose this (same as other parties).