After reading through yours and Ikkes app here is my feedback:
1. Houses
- avoid using the log supports, these are very outdated feature, replace them with just the regular blocks ( for stone base use stone, for wood use regular plank and for daub just use daub, etc...)
- Personally I would avoid the roof overhangs on the houses in order to retain consistency in the region, House Cave house style has none aswell as boggs (based on steins plot)
- for the roof supports use either fences or nothing at all
- the overhang on the middle class house is unnecessary - the house is not tall enough and given the low density of the hamlets they could just expand the houses in whichever direction they want.
- for the low class house do not mix the daub and wooden planks
2. Castle
- I think the main tower is bit too big and dwarfs the rest of the castle, I would recommend taking a look at boggs and cave castles to make sure your layout fits into the region, right now it reminds me of the old stormlands castles
- The top of the tower is a mess, either have just the regular stone crenelations or go for something like this:
- why is the tower missing its corner blocks?
- given the fact that gates were one of the most fortified locations of a castle, why does your gate have a wattle fence while the rest of the walls are crenelated?
-for the castle builings please apply the same feedback I gave you on the houses - avoid the logs, pick either daub or wood not both, go over the proportions of the stone and the daub/wood part
- why is the great hall 1 block below the ground? rainwater could become a bit of an issue there
-why are some of the walls missing a walkway while others have it? shouldnt the castle be defended evenly over its entire perimeter?
-tbh I am not a huge fan of the castle
3. Lands
- I dont think the bogs make any sense at their current location, for a bogg to form the water would have to become trapped in a lowland area, which is definitely not the delta of a small stream in a hilly area (the water would flow too quickly) furthermore the peat would have a very hard time forming there due to the saline water and probably even the tide movements which would make it hard for plants to grow over the long period of time that it takes for a bog to form
- relocating the hamlet close to the 1st men ruins to the coast would probably make more sense as it would allow the people to fish and thus obtain some source of food, right now there are no fields or anything worth while in its current location
-Given the size of the fields please make sure there are no crops such as barley or wheat being grown their they require large amounts of land
- pastures could be decent food source and livelihood for the villagers.
Otherwise good luck.