This post made me consider something with adaptations.
There are obviously adaptations of books or plays that have different levels of faithfulness. There is a subplot about Sonny Corleone's anatomy which is missing from the movie adaptation of the Godfather.
Big two comics are a bit different because the source material is so often hundreds if not thousands of comics. It's more like adapting a piece of history in the sense of all the material that's available, so you will have more changes and artistic liberties than if you were adapting a 200 page novel or a two hour play, the same way there will be elements of historical dramas that are inaccurate (composite characters, made up encounters between famous people, etc) which is totally fine.
I'm aware that no one sets out to make a bad comic, and said as much.
That said, there are compromises that make the likelihood of bad comics greater.
There are some potential fixes, none of which are perfect.
The companies can take steps to reduce the number of mediocre comics, especially when it comes to status quo changes that may trickle into books that are understood to be potentially evergreen.
The writer on an evergreen book can do their best to discern whether a development will be remembered fondly, and take that into account when considering what to add to a title. For big moments, they can also figure out how to incorporate iconic elements of a series, even if it's not the current status quo, the way Claremont and Byrne brought back Beast for Dark Phoenix Saga.
With Masterson & the Infinity Gauntlet, the responsibility would fall to DeFalco and Ron Frenz to make sure the story is as good as possible so the appearance of Masterson in another title would be a welcome development, rather than a turd in a punchbowl.