You need to get behind sides that play deep, or at least between their midfield and defensive lines. Gerrard is the only player we currently have that will do that. I don't think he does it enough and I don't think we have anyone that can find him in that space either.
I'd agree with that. Adam is much more likely to sit deep and look for a longer defense splitting pass. But I think we have to look at the players we don't have that could better support midfielders pushing into the space between an opposing midfield and defense and support our striker, rather than just focus on the presumed short comings of the current attacking midfielders and strikers.
That missing link imo is Lucas. Having him sit allows other players to push forward with more confidence. I think we saw this with Merieles last season when he was partnered with Lucas.
I do rate Adam, but think we have to be honest about strengths and weaknesses are, and his strength is passing not holding or breaking up an opposing midfield. Jay I think is Lucas's natural deputy, but with him not available I think we look unbalanced in the center with more attack minded players in Jonjo or Henderson.