Like I said they may give a reason in the show, and that reason will be the reason for going with white and will be a justified explanation because it was simply stated.
Yeah spiderman and Rorschach's white didn't pose any problems, but in this series it might...depends on the writers. Flash may not be able to move at speeds of light or even sound in this series....time will tell.
I get your qualms, but at the end of the day this is CW's interpretation of Flash and not exactly DC's or the fans. 7 times out of 10 I would agree with you that suits don't need to be changed just cause...and this is obviously a just cause modification. However, I'm starting to accept the fact as with all superhero films, that the writers/directors NEED to put their spin on things whether it's the story or suit because seeing an exact translation would be redundant some times. Not necessarily saying that's the case here, but sometimes it is.