I can't see any reason why there shouldn't be a pre-match derby thread, so that's been unlocked now.
We started the policy of merging related threads as users complained that there were too many duplicate topics, and that it was making the board hard to read.
If people feel that we've gone too far the other way though, then obviously we'll review it. Contrary to what certain people think, we're not on a power trip - we're just trying to make decisions for the good of the forum.
Personally, I think there is a valid argument that merging threads is perhaps stifling discussion. Some of the bigger threads (like the player ones, FFP, media bias, United etc) are getting a bit unwieldy and hard to follow.
We'll try relaxing things over the coming weeks, and merging less, and see how it goes.