Fixed garrison priorities, meaning the Royal Men-at-Arms (Polearms) garrison in the Royal Chapter Headquarters building will actually show up to garrison battles instead of being replaced by low tier units

Grail Knights Hit points increased by +2 per model
Grail Knights Melee Attack increased from 38 to 40
Grail Knight Melee Defence increased from 35 to 36

Heavy Armour tech gives +8 armour down from +10

Pastures, Iron, Animals and Timber reduce upkeep for units by -2% down from 3%

Royarch's Command now increases Peasant Economy by +1 for each Barracks you control

Reduced the cost of the diplomacy techs from 7000 to 5000 (bretonnia diplomacy tech remains at 2000)
Overseas Diplomacy effect reduced from +50 to +30

Taverns now produce +50 income when the province is at 100 public order
Improved Smelting gives +80 income to smithy buildings up from 50
Commissioned Carpenters gives +50 income for each tier to carpentry buildings
Sacred texts gives +30 income to worship buildings for each tier
Removed the +1 EXP rank to all artillery from the Siege Workshop

Thoughts: These new context effects will give you moderate economic bonuses to the support buildings so they are useful in provinces far from conflict even when you aren't recruiting from those regions, they also encourage experimentation with certain technologies and playstyles.
Removing the +1 rank effect from the Workshop was not an easy decision as it is a smaller effect on artillery than on other unit types so it being faction wide isn't a huge issue or anything, I just felt that the extra income generation was a more reasonable effect for the building to have.

Commission Carpenters and Improved Smelting techs no longer improve settlement income, but now add +60 income generated to Carpentry and Smithy Buildings

Reduced the amount of Growth provided by all Almshouses by 5
Reduced EXP rank for peasant mob from Almshouses by 1 (Hovels no longer give EXP rank to peasant mob)

Replenishment effect of Empathy reduced from 4% to 2%
Mystic Medicine now gives +2% replenishment
Blessing of the Grail gives +8 armour down from +10, but now gives +1 damsel capacity and +1 paladin capacity