First of all, I reject the premise often repeated by some fans that Scott Harris is merely sitting on his hands and doing nothing, implication being that he as a major league PBO does not care about the losing as long as the calendar continues to turn on whatever his plan is. That doesn't pass any reasonable smell test.
But mainly, I have to believe that there is only so much Harris can do anyway, especially in the middle of a season. He can't just go out and pick up an average major league starter, let alone a team-changing All-Star, off the free agent pile or waiver wire whenever he wants. And he can't simply acquire one in trade in which he is giving up nothing of any value to us. To believe as much is just magical thinking.
Scott Harris fielded this particular iterational team reasonably expecting that there would be offensive improvement in those guys with ceilings, and hoping that most of the remainder would hold some of their gains from last year. What he didn't do was to stockpile an entire major-league-starting-level replacement team in reserve if/when his first team players start populating the injured list like rabbits, and he didn't do that because practically nobody does that, because that takes resources almost no team has. So I believe he can hardly be fairly criticized for that.
It's hard (or perhaps more like inconvenient) to remember now, but before guys started going down to injury, our offense was doing a pretty good job, as Jay Jaffe pointed out on FanGraphs:
And this is with the team fielded this year by Scott Harris.
I get that this may be an unwelcome reminder to those fans who demand dramatic (or drastic) action NOW. But that kind of action may not even be necessary even with this 40-man roster, especially as guys start coming back off the list to help out. But maybe all we have to do at this point is wait for the guys to come back and get our roster a lot closer to what it was always supposed to be this year. And also, imagine if Scott Harris takes the action those fans want, starts replacing players and field management willy nilly, and fails because the new players, coaches, and manager are all worse. Are those fans going to be understanding of that and conclude, well, we're still losing, but at least he tried, so I'm back on board with him?