I don't believe that for a second (and in fact suspect that you are making a deliberately contentious statement). This isn't an MMO where the nerf-buff-nerf cycle is necessary to keep players rerolling, regearing and therefore spending money. (Or where, indeed, PvP-and-sometimes-PvE-induced butthurt results in strident cries of "OMG SO OP NERF ASAP SUB CANCELT WAITING 4 <insert next hot upcoming MMO title here>").
For most people, PoE will be one-and-done, maybe two-and-done for those who want to go for achievements. There's nothing wrong with it, PoE is not open-ended like Skyrim, it tells one story that is fairly on rails and has a definite end. It doesn't even have two distinct story branches like Witcher 2 for example, so people are unlikely to replay it more than maybe a couple times.
For those wishing to do so, there are multiple classes and multiple races. This offers plenty of "fresh" experience. Ripping the guts out of the gameplay of one or another class just to keep it "fresh" is poorly justified at best, and smacks of chronically bad design choices at worst. Outside of fixing outright bug-induced exploits, single-player games should offer a fairly stable and consistent environment - at least compared to MMOs. If it is necessary to rebuild characters and drastically change your playstyle every time a patch drops, then at the very least, it leaves a very bad impression; combine that with the necessity to dodge the ever-swinging nerf bat, and one may start to wonder why they aren't playing an MMO in the first place.