My opinion: it can be external tool for one transfer of all saves to new version(s), there is no need to implement it directly in the game. And frankly, the main part of this tool is already published here and Dark Silver can use itactually he said when he released .27 that he was planning to add the save transfer in the next (.28) update. So unless you just want to grind it all again you may as well wait a few more days.