Making up common names is explicitly prohibited. That being said, enforcing this can be difficult.
This would add a lot of work to an already overwhelmed curator workload. Common names are also highly variable, and verifying them is difficult if they are not published anywhere but they are still commonly used. (But the subjectivity of common names is another topic, see posts such as this.)
That would depend on your settings. This is not the case for me:
This is already sort of in place, but perhaps your proposition is more elegant.
