The question is in the title :
Why isn't all of Pricorde's content included by default anymore? I find it quite strange that the game creator content isn't included by default anymore.
Yeah but that's still what the game was originally: they're "icons" of RoR.
And if, as you say, it gave new players the impression that RoR is just that, then maybe mods should be more prominent, if that's the way it is.