Well, you would think that Keefe must have believed the new combos were a good idea if he implemented them, but he only stuck with them for 40 mins (approx). If Keefe actually believed in the new combos, it seems odd to me that he would expect them to not need some time to develop. So I wonder if he actually thought up the new lines by himself or was it someone else's idea that he just went along with? If it was his idea, why did he just give up on them because it didn't work right away, or was he somehow influenced by others to revert back to the familiar lines?
Seems like your "looking under the surface" is really just making assumptions and suggestions based on nothing.
Keefe did think those lines were a good idea,
as an experiment. It was never intended to be a permanent change, and I'm not sure why anybody thought it was. Keefe understands that our usual setup is ideal, but with a fully healthy forward group for the first time all year, he wanted to try out different combinations and looks. With the new lines not clicking all that well in the 5 periods he kept it together, and the usual lines back together igniting an explosion of offense and a multi-goal 3rd period comeback, it's a pretty obvious choice to go with the usual lines for this game.
There's nothing to suggest that he's being "influenced by others", or that he's implementing "somebody else's ideas". You just seemed to get the wrong idea about what Keefe was doing and why. He's going to continue to try stuff out during the season, but that doesn't mean sticking with it when it doesn't work and abandoning a superior setup that is working.