I heard a story about DD one time about how a producer pulled aside the Roto/Paint Lead and told him "On this show roto and paint will be very important."
The Roto Paint lead responded " Everything is going to be important, we are all important."
Why am I sharing this with you? Because that type of thinking is hurting visual effects as a whole. Everyone is important.
Put together a team, do not just fill seats. Plus if you really want your "A" team all the time as a producer you need to make sure they don't leave. Keep them busy, keep them happy. Don't micro manage them. Let them do what they do well. Making a film is hard, no doubt. Don't make it harder by hiring the guy off the street. The story starts with a single image. Talented people put there minds to work on what that world should look like guided by a director that hopfully has a vision, and can articulate it to others.
Assemble your team carefully. Choose the roto artists because they do great roto not because they are cheap but because you know their is going to be a shit load of roto to be done. Find really good texture artists if you need to be inches from cg with your camera. Get the right lighting people in. Set upon the crew based on talent not price.