C
If one presumes that the only players available were the ones that got moved, there really weren't a lot of clear upgrades available. I think those of us on the outside believe guys like Suarez, O'Hearn or Castro were examples of clear upgrades, but Even Carlos Correa is having a league average season offensively and defensively, and he's often hurt. The Twins fans I know were glad to see him leave.
I think Durbin playing his way to becoming a legitimate, all-around starting 3rd baseman really made it challenging to find obvious on-field upgrades. If they acquire Suarez, he is starting everyday at 3rd, right? So is he starting in Ortiz's place? Then you're doing musical chairs with the infield, and losing your best infield defender. Does Suarez start at DH? Then Yelich is in left, and Collins is on the bench. Does that make your team better? Since June 1st, Collins has a wRC+ of 152.
Do you replace Ortiz like-for-like? In an ideal world, yes. But other than Correa, which sounded like a unique case of his being okay to move to Houston, no better-than-Ortiz shortstops were available.
In terms of replacing the Monasterios and Seiglers of the world, it's also tricky. Those guys don't have a lot of hit-tool, but they do everything else decently enough. They can run a little, Seigler hits from both sides, they both looks competent in the field. I'm guessing they are great in the clubhouse, for what that's worth. They both have options, so when players come back from injury, or there's a brief roster crunch, they don't just have to be DFA'ed.
The Brewers improved with the Jansen trade. They improved with Shelby Miller. They mitigated challenges of outfield depth by adding a guy that replaces everything you get (except the bat) from Frelick/Chourio/Perkins/Collins.