Except Legendary is harder than fabled for some ridiculous reason, because legendary has the -20 and fabled doesn't.
On top of that they lock t3 focusing behind mythic. So by your logic, basically the entire game, once you complete the campaign, is not for the average player. Can't get better stats if you can't pull down T4 and t5 armor, and on top of all that the power deltas make power level pointless. It's not a good feeling, and I've done almost all of the mythic questline and I sitll think its terrible.
Going to be a pretty desolate game soon.