There are quite a few 5'11 goalies so I don't really think his size is much of an issue. Halak is the same height, Bernier too, Enroth too, and a few other goalies. If I was a GM, I would at least take a shot on Conz because he and Nino led the Swiss team to a 4th place finish in the U20.
Halak is quick, Conz isn't. He's a decent technical goalie, but most scouts feel he lacks the athleticism and the size to be an NHL goalie. I don't really agree with the Giguere comparisons. Giguere made up for speed and athleticism by reading the play well and always being in the right position, making his speed a non-factor.
I don't think Conz is nearly as technically sound, or even comes close to the understanding of the game that Giguere possesses. Someone will take a flyer on him, whether it be a tryout or a minor league contract, but in a position where every new kid is bigger, faster, stronger and more technically sound, it's difficult for smaller, slower kids to get by.