... and they've proven in the last week or so to be solvent since the breach.
Proven solvency? I might have missed it - how have they proven they are not now operating in a fractional reserve manner?
Seriously, hats off to them in their plans to keep their risk exposure down, their seemingly well-laid plans to get back online after a major issue, and their work so far to make customers whole. But in my world, "proof" requires proof.
The fact that anyone could've withdraw all their funds without a hitch the day they relaunched, proves their solvency (in the short term). In theory according to what they stated when they reopened, that meant all their users could have up and withdrew and left for good.
As far as the fractional reserve part, we'll have to wait and see.
Mind you, I'm in agreement, that any legitimate exchange should be audited on a regular basis by a third party to ultimately prove solvency.