I don't think DLSite would take kindly to devs distributing Steam keys for uncensored version of games to DLSite customers. Even an official patch for the DLSite version would be sketchy. But I don't think that's on Critical Bliss or Tiramisu, people should know not to expect uncensored ever when buying on DLSite.They only posted concept art not the final versions. Also, people who bought the game on DLsite will get a a free DX version, so saying that people have to buy the game twice now is incorrect (unless they want uncensored version, but maybe users will be offered steam keys. Who knows at this moment?)
Personally, having recently replayed the game from beginning to the end, a lot of early scenes desperately need a rework. So having to redo everything from ground up makes sense. Only scenes worth playing are onsen ones. My 5 cents in this is lets just wait for final product before pushing that harsh judgement on DX version. My guess we wont see anything until late March early April.
I agree that we're unlikely to hear about it more until a few months into the year. I just hope it's a first half of the year release personally.