Unless there is a revolutionary superior system it would probably reboot only the Crucible and add a new layer. I do expect most ideas would get more fine tuned. (The problem is most of the card creators think their submissions are great)
Revolution is my middle name. : P
Here are the problems as I see them, with solutions:
Everything gets archivedNew rules means everyone starts on equal footing. I wouldn't want to grandfather cards in the armory that were created under the old system into the game.
Overall level of ideas poorLimit how many card creations players are allowed to submit each month. Things like a 1 month wait after you register before you can start. Amount of card threads you're allowed to submit per month limited by forum rank. Less flood of ideas hopefully equals more consideration put towards each idea. No more collections of card creations or ranking the best card creators. Shift the goal from climbing the polls to creating the best card for the game.
Reusing old ideasYou're allowed to re-make one of your old cards from the archives as your idea for the month. You can remake someone else's with permission/if they're long gone/give them credit.
Not getting the right ideasHave more contests like Shard Revolution (bad example, shards suck) where a specific theme that is lacking in the game is explored with card ideas.
CC protection for Life contest, or
PC for more elements contest, etc.
People don't vote for best ideaNo card art during card creation, card mechanics are voted on rather than looks.
Once an idea is selected for In Development, have art contests to find the best art.
Blind submission/voting system. Maybe all card creation ideas are pm'ed to curators, who sort them and post them for voting. Or we don't use player names on the submissions. Ideally we'd remove player popularity from the equation. If several people have the same idea then several people get credit.
I'm probably quite a few checks and balances away from anything near a perfect system. It's all just fantasy since I don't think zanz would ever let the players take over.
Edit:
[21:53] <plastiqe> Xeno I'm curious, if zanz would let you, are you capable of doing the programming to add new cards to the game?
[21:54] <!Xenocidius> I am. I'm 95% sure Zanz is in a coma or something at the moment though.