As I said at the beginning of this thread, this concept doesn't bother me at all and doesn't come as a surprise because different pricing for different dates and different times is so common in the entertainment industry (note Universal's pricing for Express Passes). What I do care about is how the pricing translates into actual dollars and how any increases compare to the usual increases that Disney has implemented for decades.
We can quibble about things like complication and fairness, but when you factor in things like special promotions, seasonal pricing for resorts, package pricing, etc., when has planning for a Disney vacation (or travel to any popular destination for that matter) ever been that simple. When we travel to Disney, we look at dates, resort (usually DVC availability), airfares and so on, and then decide on park tickets based on how long we are staying and whether we are likely to be making other trips in the near future (to decide if annual passes make sense). Based on the dates of our trip, it wouldn't be any more difficult to make these decisions because we will know what tier we are in. Unless the differences in prices are dramatic, we aren't likely to fudge our dates just to save something on park tickets. With schoolteachers in the family, we can't usually be that flexible.
The biggest thing that jumps out at me from the Touring Plans article is that the sample price chart he uses is very dramatically different than the one shown earlier in this thread. In that chart from WDW Magic, the bronze price seemed to be about like current prices, silver was a little higher, and gold was a little higher than that. But all of the examples continued the current structure of extra days costing $10 after the first 4 days. In that chart, a 10 day gold ticket was $405. In the chart in the Touring Plans article, that same 10 day ticket is listed at $732.
It would appear that different people are seeing different proposed price charts. I don't know exactly where the point would be that price increases would significantly affect how often we would visit WDW. The chart from WDW Magic wouldn't really faze me, but the one from TP definitely would. There is a big difference between what I can afford and what I am willing to pay.