It is also on the To Do list. We are getting N3 done first of course, but N2 is next.
Also, we are responsive to student requests, so if you (and others if there is interest?) keep mentioning it on here, it will happen faster 
The Mandarin students just successfully pushed for a 2nd very advanced level on here HSK5 is AVAILABLE on Chinese New Year - #12 by Kelly-Mandarin-HSK_2