[Tcoat]

Waiting for a newer "better" version is a bit of a crap shoot. Sometimes they are better sometimes they are not. I have seen some great cars "improved" to the point they were no longer even remotely the same as the models that made them popular in the first place.
I do not see massive changes in the FRS's future even in the next generation as they spent a pile of time and money making the car they were looking for in the first place.
Another consideration that people tend to not think of is what the government may mandate in the period between major changes. As N1rve says, Toyota is pretty predictable in their pattern of upgrades.
This would put the fully changed, next generation version sometime around 2018-19. In the period in between any government (remember this is a global platform) could change the crash survivability, emission control, minimum mileage or any other requirement they can think of. Any one of these requirements could have a major impact on the what the car turns into.
Even if no government makes a change, Toyota itself may decide they have got as much as they can out of the current target demographic and change the car to meet a larger audience. It is actually my opinion that they have already started this process, with the suspension changes in the 2015s (not saying it is better or worse) which has made the car more appealing to a larger market. Who knows, they may even decide that is isn't making enough money and drop it altogether.


Now, on the plus side changes in technology, consumer feedback, lessons learned from current models and even designer passion may produce a next gen that is spectacular!


Soooo... to wait or not wait, that is the question.