>55% no is… ok? Typical for such votes?
Very typical, and even higher than usual.
The Swiss have votations all the time. They also can vote by mail. Those who didn't vote had no opinion, or no strong opinion, on the matter.
Also, cities who should suffer the most of overcrowding by immigrants voted against, as well as cantons situated at the border, while the backcountry who never see any immigrant voted in favor.
Overcrowding by immigrants does not mean the location will vote in favor of restricting immigration. After all, those are the places with the highest number of immigrant voters, who will not support such restrictions.