Just because they say that it's something that they say might be changed doesn't make it a bug either.
To me it seems likely to be similar to the "5 lives in riff repeater" issue in RS--something that works the way that it was intended to but which displeases many users. In RB3 there was the aforementioned pro-guitarists-playing-online-with-people-without-pro-guitar-charts issue, which no doubt worked the way it was spec'd but many users objected to it; they changed it and now many users object to the fix (pro guitarist who want to play online, who were fine with the way it originally worked ).
Let's drop it--it's an off-topic rathole in this thread. Everyone's opinion has been stated and neither of us is going to change the opinion of the other.