I'm glad they aren't putting multiplayer in the Riftrunner. Sadly they are adding it to Divinity 2. I may not buy that game or just get it cheap of Ebay or something. I don't play multiplayer and with most games these days, they put most of the design/game time into the multiplayer and I would spend a lot of money to play nothing.
At least with Ebay, I can get the game cheap without paying the designers all that money for something I would never use. It would be better if they would have 2 versions of games. One that is the single player and then another that has both single and multiplayer for slightly more. That way I could buy the part I would play and not waste my money on the part I would never use.
That's one the best things about the first game. Everything in it, I could play.