Got a 2017 DCT and bars are smooth, very little vibes of any kind except under power at lower RPMs. Have you checked your bar end weights? Its possible to remove the portion that extends past the bars and then when reinstalling them somehow miss getting the flanged part to engage under the spring prongs and your bars will buzz like a bee hive.
The check, as you unscrew the bar weight, near the end pull the inner weight out slightly and the flange of the weight easily slips into place. Then push the entire weight system in slightly until you can thread the weight screw portion and tighten. That can make a huge difference.