Hi Tseng, I Don´t think unity deliverys a half finished product or features, we gained a lot of flexibilit with navmesh for our game. it´s simple and static for now, but improvment comes in new updates.we tryed diferent solution for pathfind and navmesh before, and i´m 100% sure the unity navmesh is one the best solution in the market for navmesh and pathfinding. Now is very easy to create better AI to interact with the environemnt. in unity 4 they will suport dynamic obstacles and avoidance priority sometimes people make confusion about navmesh/pathfind with AI system. I Igree with you about ios and android pro license, i wish to a license exclusive for ios development without other build opitions, like if you have ios you can build only to ios. maybe some time they can do something like this.. is a wish not for my work or games, but for developers focused in this systems cheers!