My approach is [often] to help people to unlearn some of the bad habits of academic writing. Recently, though, I've realized that the first goal is to gain some useful habits to get by on. So the student at an early stage still does not have a bad academic style to unlearn. They have a non-academic style, for example, or barely master the basics.
*Students who write in short sentences or paragraphs and can't develop an idea in a fluent paragraph.
*Students who write the way they talk.
*Students with inadequate Spanish language skills.
A little bit of academic pomposity would be an improvement in some cases. My own style is formal, but then with enough informal touches to make a nice point once in a while. That is different from someone who simply doesn't understand the difference between formal and informal registers, or has no experience with the former.
We can meet in the middle perhaps: the middle would be a formal yet plain and clear style, one without any particular flair or elegance but that didn't call attention to itself.