Allow each claim to grow 1 freely selected tree to much larger dimensions in width and size (even maybe more variable shape...)? It could be primarily for esthetic reasons and possibly to drain authority. Maybe some other functions could added to it as well. The tree could grow exponentially slowing down. Could be chopped at the expense of authority. I dont mind if it would require be fertilized by mulch, etc.
Trees of different size are looking well. I'm imagining it would look great for a village to have it in the center, or something like that.