how does it ruin the Star Wars feel? Because for the first 20 years of the Star Wars universe, the forces for the Empire or what would have been the end of the Republic used Microphones when they spoke. When Luke talked without it, it sounded muffled. When the Clones talk without it, it doesn't. So, instead of feeling disconnected from the Stormtroopers they originally would have become, you throw in that little sound and people, conciously or not 'feel' like they are watching a Star Wars movie.

The Star Wars feel is those little things that when you hear them in every day life, you instantly recognize them. Or when you hear a sound or a piece of music in a film, it instantly brings you back to Star Wars. ADM brings the 'Star Wars' feel to TPM when he inserts some classic cues into the POD race. When the two Imperial fighters fly by at the end of ROTS and they make the same sound as the TIE fighters flying by, that is the Star Wars feel. Just little things that Ben Burtt, John Williams, and George Lucas did that made the films unique and burned them into our pop culture minds.

So, no..it isn't a big deal, but it's one of those things you don't notice at first, but on further watching you begin to think "Huh, that's weird".