for anyone wondering whether to do the sub class quests @ 34 now or wait, i can confirm you don't get any vanguard rep until the very last step. so you can do em all now and just hold off on turning the last quest in until next week, then get the rep/xp when 40 is unlocked. The last step is generating 7 orbs with your super 3 times in a strike, and the reward is a level 40 legendary class item. I don't know if the regular class quest (gives you a 180 blue class item at 30) also gives you vanguard rep or not, I held off on turning that in until next week. There are 3 quests per character, 1 for each subclass and one overall class quest. Plus one for Eris Morn and Crota.
and yeah i think ultimately the old way of level = difficulty is going to be easier for people to understand, now its light = difficulty and some people just aren't going to get it especially when it comes to raids. Its totally like Wow/FF14 and iLevel, and we will see the same level of douchebaggery down the road. Not a huge deal for anyone who plays regularly, I'm sure within the first 48 hours it'll be fairly easy to get to light 240, tackle the normal raid, and hit light 250 or whatever the current max is going to be. But down the road it'll be a big stumbling block for new players and vets with full hard mode raid loadouts.