We're not forgetting. It touches on the point I was making above. There are things they would like to have done but time, money and sometimes resources were an obstacle.People are forgetting the opening shot in the Cage. That's a pretty tricky shot, maybe the trickiest shot ever done in TOS. Given that shot, TOS may have wanted to do shots like these, but cost-wise, they wouldn't have been able to pull it off.
Resources less so because they would have thought in terms of what was technically possible at the time. So the real obstacles were sufficient time and money and to some extent what might have occured to them.
What is interesting is how dynamic that opening shot looks in "The Cage" while it looks so flat and dull in TOS-R. And in "The Cage" the 11 footer didn't even have any working lights yet.