import DXF Blocks
In fashion Industry, one of the most common exchange file format is DXF-AAMA/ASTM.
If it is too complex to Illustrator to handle all the subtilities of this format, could it be possible at least to manage "Blocks" ?
Blocks are DXF entities which can be assimilate as "Groups" or "Symbols"
but in Ai Groups and Symbols may stay on a single layer.
In DXF Blocks, you may have multiple entities on multiple layers, but you need to keep them as a single object.
So I was wondering if Ai could generate for each Block a layer (with the name of the Block), and all the entities on sublayers with their respectives number.
So, ma can find a way to manage the different pieces os a garment an dkeep all the entities respectives in a single toplayer.
Blocks can be used also in the industry for Laser /plasma/Waterjet Cutting for example, or any other manufacturing process and the lack of block management in Ai is painful.
Many Thanks

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Fabio commented
I have similar problem with new Illustrator version, with 25.0.1 I can open dxf from garment CAD and all size elements are grouped in blocks, with new version all dxf elements are ungrouped. This is a really problem for my job, I cannot update to new version because 99% of my work depend of this import function.
Why you changed import filter for DXF/DWG in last version? -
Jean-Michel Le Goff commented
Another important point is the possibility to keep the Origin of the File.
Even if the option center the dxf is not set, the original Corrdinate system of the Imported file is not kept.It could be an issue in some collaborative workflows.