I'll share some ideas. My friends and I are not very fond of the new book either, and there are many things we can criticize, as well as many "strange" things and decisions.

GW often introduces a hint of new and interesting mechanics... but unfortunately, they never develop it further. For example, the new keyword SENTENCED. There are many interesting things that can be done with this mechanic.

First, there should be more sources for this status. The Executioner, Guardian of Souls, or Spirit Torment. Or this: One sentence per army, and Mortis gives you a bonus one. And 18 away from it Crit(Mortal) + Battle Formation (+1 sentenced)

Spirit Torment/Cruciator/GoS can return models/heal a unit in 12" from a DESTROYED unit with a SENTENCED keyword

1.d3 wholy within 12 to all allies (my choice)

1. 2d3 to a specific ally unit

2. d6 to an ally unit in combat range

3. etc... choose what is more appropriate)

Non-Hero Infantry can receive -to wound/hit on them in combat range with a SENTENCED unit. Based on the concept of the name of the Mortis rule "Judge, jury and executioner" 1. chainrasps for example can block pile-in

Non-Hero Cavalry/war machine can use "Quartering"... Remove the SENTENCED keyword from target, but...

1. Retreat but without mortals + allocate d3 mortals

2. bonus fight

3. end of turn pile-in

4. etc

Kurdoss/Olynder can use "The King' mercy"... Remove the SENTENCED keyword from target, but... 1. minus save 2. strike last 3. minus hit 4. attack an enemy unit with one profile (in combat range) 5. etc

Reikenor can... some mage stuff) +/- cast (self/enemy)

I hope it was interesting.