I think the litmus test for if a word is offensive at this exact moment is if it's used in modern research papers. The fact that you would be happy to declare these papers "offensive" for the use of a word that has been used since the 1990s and added into the dictionary 8 years ago is kind of baffling.
Not to mention the word "cis" has existed forever and has plenty of scientific purposes for e.g. The prefix “cis-” comes from the Latin meaning “on this side,” as opposed to “trans-” which means “on the other side of” or “beyond.”
I've used the word "cis" to describe different isomers in chemistry.
I am way more concerned about erasing words than adding prefixes for the purpose of identification especially since the English language unlike for e.g. the German Language already lacks a bunch of useful descriptors for specific things.
The issue I think is this term originated from Transgender groups and Trans supportive LGBT groups and anything that comes from these groups according to you is automatically bad. Regardless of it's usefulness