I'm going to put this simply: Savage Coil exists. It is the 'endgame'. There is nothing harder, and it's new this patch.

If it doesn't sate you because you would rather a drastically different style of challenge than an 8-man dungeon be the current 'ultimate challenge', then sure, I can get behind that.

If it doesn't sate you because it has no new iLvl attached to it, then you're not actually here for the endgame you claim to be here for - you're just here for the numbers attached to the game. In which case, I don't think it would matter what SE does - you'll always end up complaining there's nothing to do eventually, because at some point, you cap the numbers. XIV is not designed to be a game that you spend two years just reaching level cap in, it will almost certainly never be that kind of game, and that's the game you want.