Wow.
Totally failing to realise that there is more than one type of central midfielder. Lucas will be playing regularly simply because he does a particular job better than anyone else at the club i.e. track back, get a foot in, break up play. Every successful team in the history of the EPL had had one of these, Viera, Keane, Makalele, McMahon, Souness.
Adam will be competing with the likes of Stevie G, RM for the other central spot, given that we will be signing a winger and most likely play something close to 4-4-2, Kenny's preferred formation, I can't see him getting much field time.