It is always easy to question the strategic choices made in any battle, after the fact, whether the battle be fought by armies, or by attorneys.
There are times when "throwing it all against the wall" creates a presumption on the part of the fact-finder (jury or judge, as the case may be) that nothing you are proffering is credible.
Wasn't there, could not possibly comment further, but I can tell you this: when someone comes to me after a trial with which they were not as successful as they had hoped, and asks me to critique the prior counsel's work, I rarely engage in the process. There are so many different ways many cases can be tried, and the only way you can know which one is perfect is to try it every way, and see which one works best. Until we get an effective time machine, that is not happening.
One cautionary note, though: do not ever deceive yourself, when engaged in the act of administrative law litigation, into believing you are going to get a fair trial before an impartial judge- it simply isn't set up that way.