Am I doing everything right?

[Averax]

At around level 46 in the main quest line, you'll very suddenly hit a point where the next main quest jumps to level 49. There are several sidequest lines available to you at that point however which start from Horizon and lead you to various level 45+ areas with more sidequests. There's also Beast Tribe quests available at 40 (daily repeatable quests with good EXP and unique rewards), a couple optional high level dungeons you can grind, and so on and so forth.

Well that's discouraging.