In classic wasnt so important to be in the top tier. people where scattered all over the whole world in classic.
some people had alts in much different levels, other had their green open world gear, other had there blue 5 man gear, some people got pieces of the pvp set, other the full set. some people where raiding mc and bwl and only had t1 and some t2 stuff. other raided the 20 man raids and get this gear while other had their full t3 set. in the end everybody was happy in their tier where they wanted to be.
it changed a little bit as the pvp gear became available for everybody in the end of classic (everybody farmt it for the new expansion).
in bc it already was a little bit different. people wanted to be in the current content with their gear but still they where scaterred in the different tiers. some guild where in kara, some in the naga and bloodelf raid while other raided the black temple or even the sunwell. but everybody tried to keep up his gear with the badges.
now since LK everybody CAN be and WANT to be in the current tier of the game. gear wise and raid/instance wise. and this is the only change i can see in this game.
if you cant find another game try a break from the mmos. and not just for a week ^^. or think about what you actually want from a game and then search for the game that has it.