The deficiencies you've mentioned are real. However, given the less than impressive performance of individuals to date in the US and Europe who are allegedly qualified, she's can only be an improvement.
What kind of ass-backwards logic is this? This is exactly the kind of thinking that got us Trump. “Qualified people aren’t cutting it, so let’s bring in somebody completely unqualified to shake things up”.
Saying she's unqualified is a bit of a stretch - five years as a competition commissioner shows she has some relevant experience even if she's lacking in terms of an academic and industry background.
The problem is that pretty much the only way to be thoroughly qualified is to work for one of the companies that is about to be regulated. That is called the revolving door and it's bad.
Trump is incompetent and corrupt.
In what way is Vestager not qualified? Is there an example of an action she has taken that a more qualified person wouldn't have?