Kasich is the quiet Republican, the one who avoids making outrageous statements. So far that gives him an advantage. He can't preserve that advantage.
How so? Kasich won't win the nomination most likely, but he could easily keep his same style and win the general election vs. either Democrat. Most Americans aren't partisan Democrats and saying things like we need to cut taxes, cut wasteful spending, secure our border in a sensible way and take a stronger stand against ISIS aren't seen as "outrageous."