I've managed to create 2 Hair Shape presets trying to simulate real strand of hair
When we see hair, looks like ist thinner near the scalp, this preset tries to reflect it

Same base hair from above, but, considering that it was cut recently



For a hair with length bigger than 0.2 m (here you can see the hair going to 0, that means that is a big hair and was not cut)

Use the import option from Dynamic Grooming to import the preset and use in Blender
To import select the import option (clip icon) then the Import file button will show up, press it and you will be able to choose the preset to import

PS, You need the at least have a hair particle system created to be able to import the files.