Wow...that's amazing the crappy wear on these tires. And it's not like they perform well either.
Right now, I am considering a replacement and I am seriously looking at the Goodyear Assurance TripleTred and Nokian WR-G2s. My local GY dealer has a sale on them where I save about a $100 over the Nokians. The Nokians aren't reviewed much but there's lots of reviews on the Goodyears, especially on TireRack.
Indeed, they don't seem to like anything that isn't both A) warm, AND B) dry. Lose either one and they lose grip.
The TripleTred is the highest rated Standard All-Season tire on Consumer Reports -- ice braking is the only thing it scored 'fair' on; tread life is 'good'; all else is 'very good' or 'excellent' where it counts (e.g. dry and wet braking are 'excellent'). The only Nokian tire CR has listed is the WR All-Weather Plus (H & V), but it's in the Performance Winter category.
I put more stock in CR's tests regarding dry/wet braking, hydroplaning resistance, rolling resistance, treadwear and snow/ice traction than TireRack's. CR's tests for these characteristics use precise measurement tools (when possible) and objective and consistent methodologies, spelling out exactly how the tests are conducted, whereas TireRack merely states the surfaces upon which tests are conducted without spelling out the methods in any detail. TireRack also doesn't test rolling resistance, hydroplaning resistance or treadwear. That being said, CR's not perfect; there are a couple of tires that are (as of this posting, anyway) incorrectly classified as to type. New test results are due out next month (Oct. online, Nov. print) for All-Season and Performance All-Season tires.
Now that isn't to say that TireRack's test data isn't useful -- it is (especially with regard to handling), but in a different way. They test based on "lap times", which has the effect of aggregating several tire construction characteristics into one objective measurement, which in turn is more directly related to the average driver's experience. That's extremely useful!
Then there's the publicly-entered survey data, which in contrast is highly subjective. Don't get me wrong.. there's solid math/logic behind the "wisdom of the crowd" methodology, which backs up TireRack's survey data. The only weakness is the real possibility that the data is "astroturfed" to ANY degree by faked survey responses. Considering the sample size (i.e. the number of survey entries) for any given tire, it wouldn't take many fake entries to throw off the survey averages just enough to make a mediocre tire look good or make a very good tire look excellent.
Basically, I'm saying it pays to compare tires' ratings from all sources. And then, of course, listen to yourself.
I heavily considered the Nokian WR-G2 this time around, but I figured that would obviate the need to have the winter set and, as you said, there's little to no test data available out there for that tire. Without objective test data, it was a no-go for me, more environmentally friendly manufacturing practices than pretty much all other tire makers notwithstanding.
Here's another thread re: the tires I replaced the RS-A's with (Dunlop SP Sport Signatures):
http://www.mazdas247.com/forum/showthread.php?p=4823206#post4823206
I may yet go with something else.
My $.02.. YMMV.