People do still on occasion run the old raids, mostly as sherpa for new people to the game to give them experience. It would be fun to do but the drops wouldn't help increase your light level. Unfortunately you are a little bit stuck at the moment as for Kings Fall normal mode we all really needed to be ~295 but if you could get a group of 300+ you would probably be alright ~290. It is the downside of Destiny, you can hit 270-280 pretty easy but it is a real grind to get over 290.