Dan, you may be right, but I have to say that having owned a 2013 RTL, I would NOT pay more for a 2012 RT than a 2013. Despite the heat problem, I've had no significant problems with my 2013 RT and there were a good many enhancements made to the bike in that year (floorboards, improved front end dynamics, better brakes, and a few more). As for the heat problem, it has cost me less than $3000 to rid my Spyder of that problem, and most of that was paid to the dealer for labor costs. (Would have been MUCH less, had I been able to do the work myself.) I have not dealt with the "right foot heat", because I don't seem to be bothered by that. But I could also resolve that (or nearly so) for just a couple hundred more (plus labor).
I got a fantastic deal on my 2013 RT, which negates a good bit of the $3000 I spent to "fix" it. And I actually enjoy the high-rev 998 engine - especially without the cat. It sounds great, it's got plenty of power, and it's FUN to ride!!! I have no regrets at this point, and also have no desire to upgrade to a 14 or 15 RT.
I'm not sayin' the 14 or 15 RT is not a better machine. Of course it is. If I were buying an RT today (instead of in 2013), I'd make my best deal on a 2014 left-over. However, having owned a 2013 RT, I'd definitely prefer that year over 2012 for the same money.