Under Trump, the Press Secretary position can be defined by the person in the job.
Heather could conceivable not only be Presidential mouthpiece, but also the President's "lawyer in the court of public opinion."
That's the great thing about President Trump. Because he is a "what you see is what you get" kind of person (no fakery, no put-on or pretension), he creates opportunities for those around him to "round him out."
Heather could be much more than just a spokesperson, she could effectively become an aspect of the Trump personality and thereby a real part of the Presidency itself.
It’s all good, then! She does come across very well.