You are right in saying that their first burn to the ground rebuild was based on Risto/Reinhart/Eichel. But they also had hoped to do a retool, even before 2014, with some of the young players that looked promising drafted mostly a couple years before and after 2010. That never worked out, which forced them into the 2013-15 full rebuild.
Actually, they are well into jettisoning the Dahlin era core by now. If you notice, guys like Nylander, Mittelstadt, Cozens, are also gone now, basically the most promising players from the Dahlin ear. Others from that time period like Ryan Johnson are questionable to make the NHL at all, or like Krebs who are only eeking out a marginal role in the league. Other than Dahlin himself, the promise of that entire corps of players is basically long gone.
And there are serious talks now of getting rid of Power and players around his age. Just absolutely insane, never heard of in this league until now.