Plenty of people buy a Nexus device for the modding community. Just because you don't know that doesn't mean its not the case.
Nexus 5 V2?
http://www.engadget.com/2013/12/13/google-nexus-5-improved-speaker-and-buttons/
same thing was done with n4.. this afaik has the button "rattle" fixed and bigger speaker holes.. I guess it's good that they bother with it and thinking about it, if you're unhappy with the rattle(that some seem to get) just return it for a new replacement boom