3D conversion from 2D sources barely
looks good in the best of times with the best of techniques and to pull it off you've got to spend a lot of money and a lot of time to do it properly and correctly. Otherwise you're basically making it look like you're playing with Colorforms on the screen.
A lot of money and time is certainly being spent on this project but even with that mistakes and such have already occurred. I doubt they'll spend the massive extra effort to convert an episode into 3D. I'm guessing "Head of 3D" has something to do with computer modeling, which requires making a model
in 3D even if it's for a 2D project.