I work in an industry research lab. Some time ago, my team wrote a paper. Despite the core authors of the paper being 2 team members (author A and B), we decided to be inclusive and add 2 additional team members as authors (author C and D), even if their contribution was very limited (basically they took a read and provided feedback on language and grammar).
At that time, the paper got rejected. Now, we wrote a new version of the paper. Some parts are significantly different, others are as before. Also, the two additional co-authors C and D, whose contribution was limited, left the company.
My question: is it fair not to include authors C and D in the new version of the paper?