Hi davjoin, we import AutoCad info in the following way which is true for SU 2018 as well.
We bring paper space information at 1:1 and if the paper space contains model space information then we bring that information in at the scale of the viewport and place it into a Scaled Drawing in LayOut. Both the paper and the model space information is contained in an overall Group. You can ungroup the data or enter the group by double clicking to enter, you will then be able to select the Scaled Drawing and adjust the scale of that if needed.
In SU 2018 I had imported your example dwg using the 3D tab, it brought in the title block info at correctly and created a 1/32 displayed as 1:34.3272 scaled drawing as well. It can be difficult sometimes when drilling into the group to get to the Scaled Drawing as some Acad geometry will come in stacked on top of each other, but none the less you can get to it and adjust the scale of it as needed.
We do have some issues with text as the some text will come in with the height too large. You can adjust the overall text height by creating some text with the font type, height and say color the way you want. Then use the eyedropper (Style) and then sample the text you made and apply to the overall imported Group.