We need a redesign on what the faction is intended to do.
It feels like they really wanted to make a army that played outside the rules, unrendable saves while doing mortals, everything flying and interacting with bravery all felt like attempts to make an army that stood apart and functioned outside the standard.
If they want to recapture that feel, I honestly think they should make NH;
3+ Ethereal, 6+ ward or 4+ ethereal 5+ ward army wide
Expand Frightful touch to be a buff we can cast on whole units, either giving them a 6+ frightful or boosting their current 6+ to 5+
Either more bravery debuffs or more access to shutting down 'ignore bravery tests' mechanics
Regenerating d3 models per unit per turn.
And then naturally rebalancing points accordingly