You could move const blushlist = require("blushlist") inside here to avoiding loading it more than once. But I think that would make the update problem worse, because if blushlist changes then the changes will never be introduced into simple-storage.

So, you could introduce versioning into blushlist.js (make it export an object containing a version and the map), or you could always loop over blushlist and if the key isn't in ss.blushlist, add it. The first option is more efficient and probably less work.