I attend press conferences infrequently, although more often at away matches, and can ask these questions.
He has said on ocassions he needs to bring in players and I remember seeing something that he wanted another central midfield player, although he has never said that to me at any time.
I guess it's purely a question of what is available and where the gap needs plugging urgently.
I would suggest that we have not looked like having a good left sided player at any point this season, yet Oli, Pinault and Mousinho have all shown they can do a job in the centre if they are on their game. Perhaps he has faith that with a better outlet wide a central player might not be needed and that the three above can up their game and do the job that is needed.