Old tier sets (even heroic version, and in time, mythic) can easily be farmed by anyone solo if you want them for transmog. PvP sets however(the elite versions), become unobtainable once their season is over.
Why are PvP sets more exclusive? Does this bother anyone else?
Remember, in WoD the elite and mythic sets won't just be recolors, they actually have unique models, and IMO the PvP sets are looking better than the tier sets. So again, why are only PvP sets this exclusive, why are they made unobtainable when the season is over, instead of being available for honor in later expansions, like they did with WOTLK sets? It seems more fair to me, if both PvP and PvE sets can be obtained more easily in later expansions. If it's about the bragging rights, well it's all about having the gear when it's current, so what does it matter, and why should it matter more to PvP players in particular?