I feel like the game is to blame for that. They give you the bare minimum (shirt and pants) but not a full set of Lv30 gear.
Combined with the joys of how the gear recommendation system handles tanks... a newbie tank is prettymuch doomed to be awfully geared if they don't realise they need to get more armour. (or at least to equip the Lv20 gauntlets they got from a dungeon instead of the "recommended" Lv30 crafter gloves.)
I got caught out with that one time! Somehow ended up way behind the group in the armour-riding section so I hopped off and used the shortcut... which dumped me back in the room where you get into the armour. Except it's gone.
So because I knew the dungeon well enough, I was able to take the lift back down and regroup with the party that way (and fortunately found an abandoned newbie along the way in those dark days of skippable cutscenes), but a new player would be totally lost if that happened to them.
I've had the same thought, though I'm shockingly disorganised and probably wouldn't get around to doing it.
A straightforward list/table of "at level X you gain skill Y. At this point your basic rotation should be ABC and using Y when available."
It would be a huge help for understanding what things do, instead of eventually figuring it out (or having to watch video guides, which I don't like so much for simple reference).
