No, I stand by what I said before. An extra (but manual) filtering process should be added. If posting in WIP is disallowed, there'll be trouble too. I don't really like that idea. I think the best way to go on fangames is to have at least 10% done (like, full engine, or, most of the engine, and a room or two) before posting it - lots of people don't do that, but those who do would have to put their game where it didn't belong and have to wait while the mods sifted through the topics. It'd just be an added hassle for everyone. A "percentage" system might work, though - indicating on update in the topic title what percentage your game is at. Like I might have said in the "Spirit of Fangames" topic, I think the point at which most people post in Early Production & Ideas is the time they should be posting in Recruiting and advertising, and starting to build up a team, or at least some support.
Stopping posting in completed Projects is an absolutely terrible idea. What if, let's call him "PellMell46" (purely fictional), what if PellMell46 signs up to ZFGC? He found it searching for resources on Google. He's made a Zelda game with a few dungeons and is working on a sequel/expansion to that game. What if he wants to post his completed game? What if it's really good? He'd have to go through this whole process, post it in Early production, post it in WIP, finally post it in Completed. It's just an added hassle -_-