Filtering based on location, language, and current time are all very logical. I have no problem with that. The 'bubble' problem is more about personal filtering. Who you are, what you do on the web.

But I object to your middle paragraph. Editorial decisions have nothing at all to do with bubbles. Bubbling is altering results based on the individual user, there is no connection to the results of mass media prioritization.

Basically, what you want isn't bubbling.