Although I haven't been able to verify it myself in game, it appears (in a few places) that Dragoon is indeed 30 Lancer and 15 Marauder now.
If it makes you feel any better, there's a couple of Marauder abilities that Dragoon really benefits from, last I heard.
Personally I got Marauder to 20 during the last beta and dabbled in Archery before realising Lancer (and I imagine Dragoon) is my true calling, so I kind of accidentally chose the right classes there. Either way though, getting a class to 15 is what? Several hours worth of game time? It's not a huge investment and some cross class skills are completely worth it (although they become a lot more limited with Jobs).
If it makes you feel any better, there's a couple of Marauder abilities that Dragoon really benefits from, last I heard.
Personally I got Marauder to 20 during the last beta and dabbled in Archery before realising Lancer (and I imagine Dragoon) is my true calling, so I kind of accidentally chose the right classes there. Either way though, getting a class to 15 is what? Several hours worth of game time? It's not a huge investment and some cross class skills are completely worth it (although they become a lot more limited with Jobs).