1. Anyone who follows the rules laid out by Disney should have no problem with this. The only folks who will lose out are those who have been NOT following the rules, and while they might use all manner of logic to justify their actions, or vilify Disney's, it doesn't matter, they are still NOT following the rules that Disney has set in place.
2. Those with resort mugs who claim they were sold a resort mug for life should present the mug. If that was the policy at the time, Disney should recognize it, and either honor the deal and give them soda, or just give them their money back and be done with it. Keep in mind though, that Dixie Landings is a resort that no longer exists. Oh sure the buildings are there and all, but if you bought a lifetime mug good for unlimited refills at Dixie Landings, then you are out of luck, it's Port Orleans now. (No, I'm not kidding.)
3. Does it really matter what Disney's motivation is on this? I hear all sorts of questions about why Disney would do this, how much money can they gain and who's really being hurt by the stolen (yes stolen) soda. But I ask this, who is being hurt by the rules being enforced? Water is needed for life, soda is not. No one is being HURT by this decision, so what does it matter why Disney is going to do it?
4. Resort hoppers will likely be affected by this. I would suggest that they not purchase the mugs, as for them it will not be a good deal.
5. Those who make statements inferring that time and money are going towards this as opposed to fixing the Yeti, or the Monorails, or whatever else.... clearly do not understand how a large business like Disney works. It's really just a misdirection argument and clearly an excuse for some to complain.
6. The phrase it's just soda is used a lot by the soda stealing apologists on these boards. To them, I simply say, it's just soda.