Boullier has been appointed as the Woking-based constructor's racing director just days after resigning as team principal at Lotus.
"He does add to the team," BT Sport quotes him as saying.
"The team will never be changed by one individual, but he does add something. It's good to have fresh ideas.
"When the management structure is complete - and hand on heart I don't know who will be in the roles, but I have an idea of the structure - then we will be in good shape."
McLaren finished fifth in the team rankings in the 2013 campaign.