I don't foresee any problem with buybacks bringing the invested BTC below the go-ahead threshold.
It should be fairly simple to create another mini-ITO using BTC at potentially a slightly discounted price on CoinGateway (since presumably they're still set up for it), to make up the shortfall.
Or revise the go-ahead threshold downward.
Or make up the shortfall in a private deal with a single angel investor.
My point is, there are several ways to ensure the continuation of the project while still honouring its initial rules.
A lot of us agree and there will remain great value to this project regardless of the buy-back. Most are wanting a reduction in supply so there really are multiple ways to look at this entire landscape. I think the DEV's will get the funds they need and the folks that stay in will have a nice investment.