Honestly not important. Asians are demographically moribund and not likely to become electorally relevant anytime soon.
Not yet, and probably not for some time on their own, but they are part of a broader, growing coalition where smaller but very reliable groups of Democratic minority voters form a large set of voters who combine to make a potent voting bloc. Hispanics and Asians are low turnout but a lot of investment (of which Democrats doing this year due to Trump), and a controversial, divisive figure, ...like Trump, can make these voters even more consistently Democratic. It's not like that has happened before.
What happens when Hispanics and Asians start voting like African Americans? It doesn't have to be 90%+, 80%, which given the last election's numbers is very possible. 80% support for Democrats that is highly resistant to Republican efforts is a terrible situation for the GOP. Hispanic and Asian turnout won't always be low - Additional complexities and small investment / less engagement keep turnout low, and that is now changing for Hispanics.
When your (GOP) coalition is rapidly shrinking by the year, you can't afford to savagely alienate the fastest growing demographics. This election could set them back decades with minority outreach and put them at a big disadvantage in presidential elections going forward.