Banners require the ground to be 100% even. Why? They are such small structures. Small variations in elevation are probably meant to bea llowed!
I'm not sure that I have a strong argument against sketch colors - Jorb, November 2019 http://i.imgur.com/CRrirds.png?1 Join the moderated unofficial discord for the game! https://discord.gg/2TAbGj2 Purus Pasta, The Best Client
I agree. Might be to make claiming mountains more difficult (as they can't be level'd).
I also question that they need to be on paved ground. Seems to be an easy fix to prevent them on ground that can't be paved, but I think this should be tested otherwise as having to pave them makes them ugly at times.