No roadmap, nor will there be a roadmap ever sorry..
But to give a answer on one question : To have the choice of splitting the DVD at the layerbrake to a second DVD instead transcode/changing of any MPEG2-data
This is not where DVD2one was made for, it's a nice idea but there are other tools like IFOedit who are much beter at jobs like this.
So in time we will make changes to the entire product, given more functionalibility, but as mention before we simple can not give out a roadmap simply because DVD2one is a cardhouse and very tight. Every function has so many impact on the system it's very hard for us to describe when what will be ready.
But i can promise one thing, the end is not near. We have plenty of internal ideas to make the product even beter!