Seems no one update in Crusader thread, I share my own findings during PTR 2.4:

Blessed Hammer:

Surprisingly to see the dmg has been greatly increased (700% to 1350%), but need to have the following:

Hammer Jammers (you hit enemies with immobilize, freeze, stun = enemies take max 400% increased from Blessed Hammer for 10s)
Sacred Harness (for Falling Sword to gain effect of Judgement immobilize + 40% reduction)

I think I will play this set

Roland - Shield Bash:

Dmg increases, but the Crumble rune has changed to "increases dmg of shield bash", no more fire pillar.

Thorn Set:

Seriously, I still dont know how it works yet, but you definitely need the following:

bombardment belt: so that you can have 6s of 50% dmg reduction
Heart of Iron: gain thorn equal to your max 300% vitality
Hack axe: max 100% thorn applied in every attack
Sanguinary Vambraces: Chance on being hit to deal 1000% of your Thorns damage to nearby enemies
Boyarsky's Chip: new thorn gem

This is my findings so far

i think the LoN set is much than the class set in my opinion 

The Litany ancient armor/weapon build?

I havent tried that build yet

Yesterday I finally knew some hints of playing thorn set

it's all ancient gear booster set , mostly uses for thorns and blessed shield build but can be experimented with other skills as well but haven really try it la   

What build for coming season?

thorn + LoN

Akarat's Awakening crusader shield...this is the only last item i need to fully equip my crusader. I have been farming like crazy at GR50++, normal Rift, and adventure more but no drop yet! Im at Paragon level 400++ already. Spent all my Blood Shards i think 20k already but not even a single drop! I get so many same type of legendary and set shields but not akarat's awakening! I am so freaking frustrated!

Monster not dropping it for me, kayala dont want to give me for all the shards i spent....what to do now? Keep farming again? Anyone have this problem?

have an invoker punish set...but can't handle GR50. Does anyone have any tips on how to improve so that I can go GR100?

Akarat's Awakening crusader shield...this is the only last item i need to fully equip my crusader. I have been farming like crazy at GR50++, normal Rift, and adventure more but no drop yet! Im at Paragon level 400++ already. Spent all my Blood Shards i think 20k already but not even a single drop! I get so many same type of legendary and set shields but not akarat's awakening! I am so freaking frustrated!

Monster not dropping it for me, kayala dont want to give me for all the shards i spent....what to do now? Keep farming again? Anyone have this problem?

my invoker set allow me to go highest g rift 60 so far. want higher? i think u need all ancient legendary items and using litany nightmare set to boost your damage output

you mean throw away the Thorn invoker set and replace with ancient legendary? That damage output is better than the Invoker set?