It is a
2-cross (2x) spoked wheel, so it's a little out of the ordinary, and it sounds like it's a lot out of his expertise. Like many have already said, there's nothing inherently flawed in the 2x pattern, I guess it might be marginally weaker, but the biggest impact is the build of the wheel itself. I guess you could buy beefier spokes, but I have a feeling a spoke replacement followed by proper retensioning should resolve this.
It'd be close to lace this 3x, but can anyone see why that would be impossible?