This guy gets it.
Though, I'd augment that that a faction needs enough commanders to cover all desired roles. For instance, the powerhouse commander in live game is Lightning War. It's OK if OST gets a commander that also covers a more defense-oriented style too.
For Brits, Artillery would have been the obvious rework, but Brits already have good camping commanders.
Are you referring to the survey link? I can't see either Mechanized Assault or Festung Support as options in the survey. I would have also liked to choose bothof them (which would have also fixed Mechanized Infantry). Mechanized Assault might completely vanish from meta due to T3/T4 changes.
I think he used: other option and wrote it down self in the survey