I'll reopen this old thread (if there are newer ones for frisian balance, point me to the correct places) to add a couple of observations and a general balancing idea.
first, berry farms and fruit collectors have a problem in that the collector has the same range of the farm. this means that, since you can't build the two on top on each other, there is always the chance that the berry farm will plant a bush outside of reach of the fruit collector. I find this a little nuisance that adds nothing to the game in terms of planning or decision-making. So I would propose to increase the action radius of the fruit collector and beekeeper from 4 to 8.
Second, the swords have a very light image, especially the broadsword. while they look good, the problem is that when looking at a training camp it is difficult to tell if the sword slots are empty or full. I kept a training camp stopped for half an hour waiting for the swords before realizing that they were already there. Something should be done to make them more visible. Maybe give them a hilt of a strong color (say, red) that would make them stand out from the background.
Third, as a general concept, the frisians need a lot of different buildings - they have more buildings than any other tribe - and many of those also require more space - most notably the farms. I think as a point of balance frisian buildings should work faster, so that the overall economy performance would be balanced with the other tribes. In particular, I found it takes an ungodly amount of mines, furnaces, and armor smiths to feed a single training site. this should be cut down to something more reasonable.