It's ridiculous that for instance CA has a 73 pages long thread. Who is going to bother to read all of it? If nobody reads it, who is going to find out about the
new Chicken Tag?
EDIT: And what if someone wants to comment on Chicken Tag when it's buried beneath 5 pages of not related CA posts?
Another example:
viewtopic.php?f=1&t=18431
I was suggested twice that the topic didn't belong to that forum. Still, most of the strategy topics ARE posted in that sub-forum!
There's nothing wrong about having multiple sub-forums, for instance one for modders, and one for players.
This forum for instance has separate sub-forums for game components, and it works pretty well.
Though due to the evanescent nature of the mods, and the fact that you would need to decide if a mod is big enough to have it's own subforum, I think this is really the best idea:
Or just have a forum, where you can make topics about any spring mod, just tag the topic name with [BA], [EE], etc.