Well, while not a priority problem, it should be considered. The fact is that it's shown 34/35 on planet codex completion even though player collected all they could during their gameplay.
All the games I played that had the codex had the ability to be fully completed (unless it was a bug). Making a codex with bars showing 4/5 completion or similar when player can't collect that 1/5 is not a good idea in my opinion. Just remove the bars. It wouldn't make too much of a difference, but at least it wouldn't be an eyesore for those that are annoyed by it.
When I started playing this game I wanted to collect all codexes for it, but quickly realized that I will never have all of them (either wrong faction or missing codex) and decided not to do it.