You could try a happy medium. Map the terrain both ways (Planar and Tiled), and then release it as a planar prop with the UV information from UVmapper included in the package for the tiled version. If someone wants the tiled version, all they need to do is apply the UV information to the OBJ files. It may seem like extra work, but a tiled version might be a godsend to those folks whose systems are memory or processor challenged.