Looks good.
I think the most fair distribution of NEU will be if you limit the max amount of BTC to be received.
It is better to have 1000 people sent by 0.1 btc than 100 sent by 1 btc.
Certainly, and maybe setup a neutron foundation account that would invest 1BTC and invests its part in sponsoring different developments and promotion of the coin (eg funding bounties). I feel this is missed in the nxt community where the stakeholders are expected to take that role, but it's understandable at least some of them hold their coins