The staff member involved in the discussion this time is Masanori Nishii (西井正典), one of the mechanical animation directors from Season 1 and 2.
The mecha featured as the insert image this time is O Gundam. You can read the entire article (in Japanese ^^;) is on Yomban.
Masanori Nishii worked on the same role for "Gundam SEED Destiny".
Image is from Yomban.