Built-in autosave feature (for the TE version).

Speedy - Navigation
Terraformer - Pathfinding
Marauder - Economy (can even remove the old attribute)
Leprechaun - Luck
Merchant - Diplomacy
Governor - Leadership
Healer - First Aid
Sniper and Explorer - should be removed altogether
Eagle Eye - as in Heroes of Might and Magic III

Governor is too overpowered for Leadership... people will constantly restart if they don't get a leader at the beginning. It's a walking gold mine and a few hidden treasures on top of that, and that's already at level 3.

The same goes for Healer - it's too strong for a single skill; people will only hunt for him at the start.

There was an idea to give the Marauder's bonuses to Leadership, but we need to think about the percentage so that Castle doesn't just rake in money, but in moderate amounts.

Accordingly, assign Merchant to Estates. This is in line with the skill - either buy goodies or get them with money.

Speedy, yes, to Navigation.

Leprechaun, yes, to Luck.

Terraformer, yes, to Pathfinding, but we need to think about it - Pathfinding is still a useful skill, maybe it would be better to assign it to Ballistics or Artillery. The second problem is that Terraformer is a fairly strong skill; it can give the advantage of your land in all battles, which is significant. Maybe somehow limit it in this regard. In short, it's up for discussion.

Sniper, yes, can be removed. There were suggestions to give Ballistics the ability to increase the range of direct fire - a worthy compensation for Sniper.