Did the Alderaan Bonus series recently on my lvl 42 trooper. While doing I noticed one (well really two) big problems with this. While I was doing it, there were only 4 others in alderaan that were high enough lvl to do it, while the other 70-80 people on the planet at the time were below 40. With only 4 people on the planet, I had to skip Heroic quests because there wasn't anyone doing them. The other problem was that captain vakar (I think that was his name) was bugged, I could click him but he wouldnt start a conversation (So I didn't even get to finish it). You need to do this bonus series several lvls higher than you would normal do quests on alderaan and there is no notification before hand that you should go there for the bonus series (it actually seems fairly well hidden on alderaan).
My suggestion is to mail something to the player upon getting to lvl 40 and having their alderaan class quest finished so that people can know this bonus series exists.