Can Adam and Henderson handle a midfield just by themselves though? I don't think Henderson is as good a tackler as Lucas by quite a distance. Against teams with 3-man midfields especially I think they would get overpowered.
All I can say is, is that the only way we'll find out, is to try it.
They're good players in their own right so we, like Kenny, will have to show some faith in them. With the way we have started to look of late, perhaps the onus on having a defencive mid-fielder mightn't become as paramount seeing as we are starting to control and have more of the ball lately, and to be fair, in our next 6 games we should be playing on the front foot, not the back, so, theoretically that could, or would, give them enough time to develop some sort of understanding. And in the bigger picture, even though it's a set back to lose key players such as a Gerrard and a Lucas, that then opens the door to others to step up to the plate and gives them the opportunity to show what they can do.
These times, are the true test of our squad and whether has Kenny bought well or not, you could say these next few months will be as telling for Kenny more so than any others in his tenure.