To be fair, this is an expedition rated tent. Still, that's heavy.
I bought the Black Diamond StormTrack 2 for mountaineering trips. It was really roomy, and at 7lb, felt more storm resistant than a UL alpine tent would be. It would be hard to justify an 11lb tent to me.
I think the First Ascent tent is trying to compete with the North Face VE-25, which appears to be "the" standard expedition tent by which most others are compared.