My druid kept her T6/sunwell gear, and healed Naxx10/25 just fine as well.

When they readjust our current items the jump won't be "as big" but you're comparing an ilvl 333 to ilvl 277. That means a higher stat budget, along with it being halfway through the level ladder.

So hey.. if you get the same sense of achievement out of your gear for picking flowers.. or killing 10 murlocs that hard mode raiders get from completing some of the funnest fights designed by the blizz dev team.. then more power to you. There is no right or wrong way to play thing game.. so long as you have fun doing it and don't break the rules.