Reshoots are a normal part of big-budget filmmaking. Creation is always, always a process of trial, error, and revision, and any creator given the chance will keep on revising their work until it's released -- and sometimes afterward, as with directors' cuts and so forth. So when blockbuster filmmakers have vast amounts of money to throw around, it's no surprise that they'd go back and reshoot things -- especially since the Hollywood feature industry considers scripts an afterthought and thus often doesn't bother to get movies' stories in good shape before filming them.
So attempting to use reshoots as evidence that something has gone wrong with a film is deeply disingenuous.
I have no idea why you think that. I would far rather see a movie led by Anthony Mackie than by, say, Jeremy Renner or Chris Pratt.