Not sure if this change is really necessary. Yes, many a referee, at least early in their development, has asked a team to choose which side of the court from which a team would like to start. I'm pretty sure there was never any confusion amongst the players what was meant, but the new ref quickly learned that it's end not side.
But the version of side referenced in this rule change proposal is a different one, where side is 'one of two or more opposing teams or groups'. (For example, are you on the side of good or of evil?)
So I feel the usage is correct as is, and shouldn't be drawn into the current side/end of the court controversy.