Some observations:
* the differences in resource cost between a palisade and a brick wall are huge
* right now it is close to impossible to take over or free a palisade defended localized resource (or any other spot with a palisade), and way to easy to make it the fortress it is today
* defenders have little to none ingame mechanic to defend bases other than with walls so when the walls fall, its basically game over (would be way more balanced with traps, pits, archery towers, boiling oil, tamed wild beasts helping in defense, etc etc)
* shields should not be the static 60k they are now, no matter the size and contents of the claim...(meaning someone claiming a localized resource with just a palisade should not have the same 60k shield as a 10 -player village with tons of houses and other structures in it)