I do not have such plans, sorry. I agree that this would be a useful feature (although surprisingly I've never been asked this question before :)), but it's just too hard/impossible to implement. The two generators exchange information by putting it into a url. Currently it's a seed, a few flags (coast, river etc), a name. For comparison, warping data of a medium-sized city would consist of hundreds of floating point numbers. Urls are not suitable for that. For the same reason, changes made with the warp tool are not saved in permalinks.