Lack of End Game Content

[Millybonk]

And since when lv 80 dungeon are challenging content ?

And the actual scaling don't work the other way around, the monster don't get any changes, neither are the bosses, only the players get their stat low down to a certain extent, our gear still break totaly the balance and make them a faceroll anyway.

You ask for something totaly new that would require a lot of work.

The first few times, after that's it's grinding the same 3 dungeons until you don't need item drops/tomestones.

I know, but for the current scaling to work they have to have numbers about enemy HP, enemy damage, player damage, thresholds when you unlock certain abilities etc. - or else a lvl 80 ilvl 440 would just melt everything in sight, even when scaled down.
Which is why I ask the opposite: using e.g. a lvl 80 ilvl 430 as the base of comparison in terms of HP/damage done and scale mobs/bosses up accordingly.