Cologne Bonn Airport is nice because it is small a...

Cologne Bonn Airport is nice because it is small and transparent.
The railway station is right there which makes convenient travel to and from there. As a frequent traveler, this is important for me.
What has saddened me is that so many shops and restaurants are still closed and some, I suspect, will remain closed. The pharmacy used to give great service pre-corona time.

2 things this airport could improve on:
1. The passport control for international flights. These lines are always very long and could do with an extra person or two during peak hours.
2. The toilets. They always and l mean always, have a bad odour. They are not particularly unclean but they just smell bad all the time.
What would also be a good idea is to have the toilet doors opening to the outside instead of inside. Reason for that is that it is easier access for the single traveler with a bag or 2.
Maybe one fine day these toilets can be upgraded and this can be changed? Hamburg airport has it and it works well.