
I think this kind of elaborations is fairly standard! I don't think there's a problem with it, as long as you consider two things:
1) What will you do if someone else has also elaborated, but they've made different extrapolations than the ones you made?
2) What will you do if more official lore comes out that poses your ideas as contrary to the official ones? (A lot of xaela RPers - especially Dotharl - had this problem when Stormblood released, because the elaborations that the in-game quests made weren't immediately intuitive from the previously provided elevator pitches.)
Most people resolve this fairly simply by just having their character be from a different family unit in the tribe, or from a different camp, that had their own extra quirks without the difference being so significant as to have caused a formal tribe split. If that works for you, then you're A-OK.
1) What will you do if someone else has also elaborated, but they've made different extrapolations than the ones you made?
2) What will you do if more official lore comes out that poses your ideas as contrary to the official ones? (A lot of xaela RPers - especially Dotharl - had this problem when Stormblood released, because the elaborations that the in-game quests made weren't immediately intuitive from the previously provided elevator pitches.)
Most people resolve this fairly simply by just having their character be from a different family unit in the tribe, or from a different camp, that had their own extra quirks without the difference being so significant as to have caused a formal tribe split. If that works for you, then you're A-OK.