Hi Decorix, thanks for the purchase!
So the Tessellation View Distance label is sort of misleading and it’s something i may need to fix in my next update - 0 or negative values will make the tessellation fade out at further distances whereas higher values will make it fade out closer to the view. You can think of it more as a Fade Distance Threshold than view distance as it was before the update.
As for the AO i created them with BitMap2Materail for this particular pack and i created them from the Diffuse Texture - The AO map is actually the Alpha Channel of the Roughness texture.
And yes, all updates to my packs will be provided free for those who purchased them - I may release new packs that might have a newer method of achieving some of the materials in my other packs though as the Engine has new features released.