Too late to take them out, not really but I would rather not. You will not see them as a major component in the frames, but something that will add to the objectives. Having a tank to tank battle, or flying low looking for, and finding a tank column sounds exciting to me!
Personally I would not mind rolling over a few hills to take a vfield, but that is just me. Others might feel like you do funked and I would respect that. Certainly if I was a frame C.O. I would not assign a squad to tanks if they were opposed to it.
If most feel this way then you will not see many in the TOD's, I just hope that is not the case.
As for walk on's, never in a TOD as long as I am around running the show.