The Dallas Mavericks are just as close to home-court advantage as they are of potentially being the 13th team in the Western Conference. The decisions for owner Mark Cuban and GM Nico Harrison in the coming weeks won’t be easy ones. Whether the Dallas Mavericks’ front office wants to hear it or not, the fact of the matter is that its roster is mediocre despite having a generational superstar in Luka Doncic who is nearly averaging a triple-double with 33.8 points, 9.1 rebounds and 8.6 assists per game. As much as owner Mark Cuban and GM Nico Harrison would like…