I agree with the idea, but I have two issues/suggestions with it:
1. How are non-C3X authors supposed to know which songs are being authored for C3X? We want to keep the releases a surprise obviously. But people might commit a lot of work to a song, only to find it released as a C3X song and their work became in vain, which is very disheartening and might even discourage people to author.
(Funnily enough, HMX can do the exact same thing to us, but the amount of content they release nowadays is fairly small so the risk is low...).
To solve that problem, my suggestion is: let's give authors some platform to check if a song is scheduled for C3X or not.
The simplest way would be a private message. If an author would like to char a song for non-C3X release, I think he should be encouraged to message a mod, who'll check on the scheduler and give him an answer. Sure, some secrecy is lost, but we'll ask the author to keep the information private. I think one person knowing about one song is much better than double work, taking off releases from the database and disheartening authors.
Also, this places some accountability on the authors - if you didn't check with a mod first, you take the risk of your song being taken down. I think it's better than the correct proposal of "releases might be taken down, and non-C3X authors have no way to foreshadow/prevent it".
2. What if the C3X release is scheduled for a long time away? If the C3X author didn't do any work on the song yet, and a quality version appears in the DB, wouldn't it be better for everyone involved to simply change the C3X song? No work is wasted and everybody gets an extra song.
A similar thing happened to me recently (The National's "I Need My Girl" - it wasn't on the scheduler yet, but it was a strong contender for a future pack I was planning). It was released by BornGamerRob and my response was "excellent, that's less work for me", and I replaced the song with something else. Everybody get an extra song, and of course Rob is an excellent author so quality is high.
We all have many songs we want to chart. I'm sure many of us would be happy to simply switch their song. Personally, I think those kind of decisions should be made on a case-by-case basis, taking into account: how far away the C3X release is, how much work was already done on the C3X version, and the quality of the non-C3X version.
So combining both ideas, I would propose this workflow:
-Author wants to chart a non-C3X song.
-Author message one of the mods, who check the schedule to see if the song is scheduled for a C3X release.
-If it isn't - mod gives author the OK to chart the song.
-If it is - mod contact the C3X author and asks for progress on the song, and how willing he would be to replace it.
-If no work was done on it yet and C3X author doesn't mind, C3X is replaced and original author gets an OK.
-If significant work was already done on the C3X version (or C3X author is strongly against replacing it), original author is asked to chart something else.
Problem with this idea: since normal releases aren't as 'committing' as C3X ones and follow no schedule, original author might end up not finishing the song, and we end up with no release at all. I hope that knowing a C3X release was changed for you, will give authors some extra responsibility to indeed deliver their version.
Further suggestion: if the song was a part of a planned C3X pack (I was planning a pack of band X, and author asks about a specific song from it), than non-C3X version can simply be added to the pack and become a C3X song. Possibly solving the problem I mentioned (as now there's a commitment to this version too).
Hope this makes sense, sorry for the long post btw.