see if you can re-write this so that Blizzard may consider it. Asking to decentralize their product is asking them to not collect money for their time invested in the product. You'd have to come up with some financial model that would prove it has a long-run effect that counteracts against the obvious short run effect (of not making money, and losing their active users to these 'private' servers.) Keep in mind that when you talk about players losing interest in a game, it's perfectly natural and especially in a tech.industry it happens in such a short span of time.
Would love to hear how this can be pitched to Blizzard though!