The document lists a bunch of small changes, erratas, and corrections to abilities throughout the book. However, some of the changes actually impact the gameplay:
Before you would gain advancedment points by succeeding or failing a skill check. Now, you only gain advancement points by succeeding a skill check.
Before, characters would recover the listed values whenever they had a 8-hours period to rest. A character with an untreated injury would recover 1 point, one with treated injury 2 points, and an uninjuried character would recover 2 points plus Heart rating.
Now, those listed values are when they are recovering on a safe place (such as an inn or at home). If they are travelling, they recover poorly (slower than normal). A character with an untreated injury does not recover, one with treated injuries recover 1 point of Endurance, and an uninjuried character recovers 2 points of Endurance.
Those now cost about 25% less advancement points to upgrade.
Intimidate a Foe
Is now a much better option, the cost of one Hope point for failing the check was removed, and the Hate points removed was increased by one point per margin of success. An extraordinary success will remove either 4 points or the character Valour rating.
However, before, the loremaster would remove that value from all enemies, now he divides the Hate points lost between enemies however he chooses, which is somewhat balanced if you have one strong enemy with lots of Hate points grouped with many smaller enemies with few hate points.
So it was a buff/nerf depending on the situation. But the removal of the Hope point cost at failure is surely a bonus.
Obtain a title
You can now obtain a feud, farmstead, house, cottage or another benefit from befriending one of the settlements. This is a new undertaking that can be done during downtime for characters who has performed some good deeds within the territory of another Culture.
Now there are consequences listed for every type of hazard, so the loremaster doesn't have to come up with something by herself.
As you can see, most of those changes are small and can be implemented if you own the first edition of the game without difficulty.