I have no idea how successful Fluent will be at all those things, but it's just peculiar when a site says "we're tackling problems x, y, and z" and you come along and say, "your ideas suck, try addressing problems x, y, and z instead."
Having spent the last 3 years of my life tackling this problem I would say I am pretty qualified to say this solution sucks.
And they are totally not solving the problems I mentioned, they are building a new mail client. Which tends to be a completely different thing.
Anyways just my 0.02$