Tactically, it's quite important.
Cabaye was our main creative force, we don't have him any more. We used money from his sale to buy a set of players who should be considered his 'replacements'. To improve our team, this/these player(s) have to be better than Cabaye, to stay the same they have to be of equal quality, and to regress, they can be whoever the fuck you can get. I reckon we've gone for the latter option, hoping that their collective efforts might match his.