As far as Poetics go... the new Expert Roulette doesn't even give Poetics at all; it only gives 80 Law. Meanwhile, the High Level Roulette (all 2.x level 50 dungeons) gives 100 Poetics, and also EXP. Now that Poetics are the only tome tier that exists at level 50, all the previous Soldiery gifts will now turn to Poetics, including the "first-time" bonus. So, in truth, it looks like it won't be very difficult at all to earn Poetics before purchasing Heavensward (or, more crucially, as needed to raise your item level enough to finish the 2.55 story content).
That said, it would indeed be nice if you could run the High Level roulette without having unlocked all the dungeons in that long list.
