[Suggestion] The Armory's full potential

I am firmly against any sort of treadmill content. If a game requires that for longevity it does not have enough going for it on its own and should suffer the consequences. That said, I am for cosmetic rewards for achievements in ranked play, such as special skins/effects/whatever for the top ten players and special feats pertaining to win-ratios etc.
Hell, how about some official 'Funday Monday'-like stuff with special rulesets, a separate sub-ladder and cosmetic rewards?

TL;DR: Keep your CoD out of my PA, thank you very much.

This is precisely what this post is all about Sorry if the phrasing sounded like something else.

A very interesting read concerning the potential use of the Armory (a good approximation to "the key to get it right" in the second page under the "Cosmetic item store" section):

http://www.pcgamer.com/microtransactions-the-good-the-bad-and-the-ugly/

In the PC Gamer survey of microtransaction systems in games they say that having a cosmetics store is "A straightforward, easily understood transaction that doesn't unbalance the game. Ideal.".