My main concern is basically this: If the Top500 ranking is supposed to have any meaning, you will need thousands or even tenthousands of games per day. Otherwise each of the 500 different decks will get only a couple of games which makes for a not very significant ranking. In other words, T500 needs to be grindable.
So the question is would people grind Platinum League as it is. With an expected winrate of maybe 10-20% ? I just don't think so. Sure one might try it once in a while if you're feeling lucky, but overall I think it would just not be fun getting thrashed over and over.
Since my idea of also leveling your own deck has seem some positive acclaim, here are some further thoughts how it could be handled:
- Before playing T500 you choose a level for your deck. This level may be anything between 0 and your Level in Top500, but not above that. Of course you have to build your deck with the restrictions for that level.
- When you win a match against T500, your reward is weighed with the difference of your deck's level and the opponent's level. So if you are a lvl 80 player, you can make a level 80 deck and tear through Bronze League, but your reward for a match win would be very slim. On the other hand you can also build a lvl 0 deck and try Platinum League (and probably get crushed), but if you manage to win - payday.
- That payout function obviously has to be pretty sophisticated - you probably don't want abuses where you can just grind through lower leagues with a high level deck and gain massive score, and low level vs. high level lottery seems pretty silly too. I guess it should mainly encourage the player to pick roughly even opponents, as those games tend to be most fun - challenging, but with enough success moments.