Let's cut to the point.
The separation of Free Cards from the current Casual was intended to give people an area to post cards without having to follow design principles and well, be free to do whatever. This meant breaking the 5000 ATK/DEF cap, Joke Cards and well, everything else that wouldn't fit into Casual as-is.
General reasoning for splitting is that some of you who post in Casual Cards do put in some effort for designing and not getting it mixed with broken cards in the area; especially since Joke Cards as a section got retired.
As you guys probably noticed by now, Free Cards is generally inactive nowadays and after reading things over, yeah, there isn't too much difference between Casual and Free in terms. Unlike the DP area, posts do come in, but very minimal. Also takes away some of the activity from Casual.
I plan on moving all of the threads here into Casual and updating the rules accordingly within a week or so, but before I do that, giving you guys the opportunity to speak up.
(Would you like the sections merged back, or the way things are now is good for you? I can always repurpose Free Cards for something else if merging is what you want.)