By the way, it is worth doing the Alderaan bonus missions even at level 45.
I forgot to pick up the chain when I hit 40 (or whatever the level requirement is) but got it at 44 (the mission was grey). I went and handed it in anyway (for 5XP haha) but the followup was green so thought I'd do a few.
I ended up doing the whole chain. Missions were granting between 11-21k XP (for normal missions, not heroics (there are 2 x 2+ heroics)) and bonus missions granting 5+K xp, so still good XP and mobs were dying a lot faster.
Ended up going from level ~44.9 to ~45.25 in about 2 hours. Not bad.