I had the chance to check this out today and I'm very happy with the result!
There is some work left, mostly on the terraforming-side:
There is stone mixed into groundmix of the small forest-extension on the eastern side of your project. The minimap shows the border very well. Please remove those - I suggest replacing them with leaves. Overall I'd advice to add a few more leaves and maybe a few forest plants, otherwise it looks like grasslands with jungle bushes.
This is the hamlet next to the forest. I don't like the whole fence borders, especially at the height difference. If you move height change more away from the yards. Maybe change some borders to hedges, if you like. Also, the clothline is no good place for spiderwebs
.
This is your other hamlet. Again no fan of the fence border, especially at this 45 degree angle. Consider changing (parts) to a hedge. Also, while the 45 degree house fits the angle of the road I find it highly unaesthetic. Consider changing it at least to a 60 degree angle.
I like the few trees you placed along the hills. I would consider adding a few more trees along the hills and maybe even very few along the hedges of the fields. However, it does not make sense to have that many trees around a windmill, people would cut them down so they don't interfere with the mill. Remove at least one fo the two groves next to the mill.
The fields are already quite steep on the left side, but on the right side it is almost at an 45 degree angle. I'd do a poly-selection and move the whole top a block down first, and then smooth the remaining border a bit.
Your pastures have entryways and small huts, great! However the ground and grass mix is not very pleasing. Overall I'd hope to see pastures like at /warp byrch or /warp rollingfordhamlet. If you do not want to redo them completely you should at least remove all plants growing on gravel and dirt aswell as changing around 40-50% of the savannah tall gras to a normal 31:1/31:2 mix. Right now the amount is very irritating. When replacing them make sure to not replace 2 blocks high grass! If you need help with how to do this, just ask me. Otherwise I'd prefer the total overhaul of the groundmix, which should not take too long either.
That's enough criticism. The holdfast and castle are looking great! Especially the lower storeys of the keep are very realistic norman keeps, well done. After my feedback is adressed consider this project
approved.