Getting a new editor wont solve the issue as it goes deeper as some say here, based on what I know from the star wars comics and articles of various artists tracing and stealing art and the confirmed cases here, its something marvel allows and the owners of marvel protects their artists doing this, almost like its a practice of theirs at the moment.
You dont see marvel firing their artists or demoting them etc but keeps them employed, and dont care if they are found out, nor does it seem they hire other artists but their inside artists, mostly.
Why this is is the question but well the art do look stunning so as long as their causual readers and comic fans that dont care about these things let alone about aliens franchise, and sells well, they wont change their aproach I reckon.