Reason #1:
Why would anyone pay membership fees?
Your whole proposal lives or dies on the ability of getting people to pay you fees.
Reason #2:
Where will you get this professional staff and how will you pay them? Most people that work on STEEM, work for pocket change or for free. Im not sure membership fees (that i dont think you will even be able to collect) would cover the wages of a team of professionals.
Reason #3:
Without substantional funds the structure doesnt matter. You cant force people into a contract here and without that your structure will fall apart as soon as

1. Funds run out.
2. Enough time passes and the foundation isnt as interesting to be involved in.
   Which is actually why you do need Neds SP.

Reason #4:
Same as the rest.

Reason #5:

It doesnt seem simple because its really not. I looked at the structure and the voting process. People dont understand what private keys are and this just adds another layer of confusion.

I see you put a lot of work in this and the effort is easily seen. You will get a thumbs up by people for your contribution and all that.....but the truth of the matter is that this is all either wishful thinking or cant work in practice.