Retaining fine detail when sending back to Daz...

blanston2

So I was working on a figure, and I moved the subdivision level to 2 so I could add indentations for my character's ribcage with the displacement brush, then I moved the subdivision back to zero to send do daz as a morph, and I lost most of the detail (even with high definition on in parameters). I know I can't send the higher polycount character back to daz as a morph, but is there any way I can retain details created with the displacement brush? 

Alternatively, I saved the higher polycount character as an obj file and sent it into daz, and it has the same high-count polygon structure. Is there some way I can reduce the number of polygons in Daz and retain those details?

Sorry if this has been asked before.