That would be an interesting adventure for sure but I'm not sure I've ever heard of a glass boat doing this but I could guess it has been done a hand full of times. At the risk of being repetitive, the Northwest Passage is heavy steel boat territory. My thoughts are, if a route stays open long enough, any kind of unexpected weather could possibly trap the vessel in a bay and crush it. In any case, I would say you'll need quite a supply of survival gear should you end up on the ice, it could be some time before help arrives.
From what I know, much of the arctic is not charted very well so he careful with that.
I'm not saying you need an ice navigator aboard but I thought the information below could be useful reading.
From Transport Canada
It is always recommended that experienced persons in ice navigation be on board all vessels operating in Arctic ice-covered waters.
Source: Ice Navigators - Transport Canada