I agree, seeing a pic would help.
When water streams over the front of the obstruction (lure) it creates alternating vortex on each side. That is what creates the wiggle you see in lures like Mr. Wiggly, Magic Swimmer, etc. You can also search not only Vortex but Hydrodynamic flutter. For this flutter or wiggle to be largest, you want a larger front surface, usually tapering to a thinner back.
The segments usually add flexibility but do not actually add to the vortex. Normally, the more flexibility, the larger the front (but not angular or squared off), the more the taper of the body, the more the wiggle. The subject of Vortex or Hydrodynamic flutter can take volumes to explain complain completely, but for our purposes, I hope I have given enough to start.
An edit, I am providing a link to some I made several years ago. They swim great, so you don't need to overdo the larger front, taper, etc. It is a Microsoft Onedrive link, so you will be prompted to sign into onedrive.
https://1drv.ms/i/s!ArO0ha903rntnXG0aUuW81Qb3aERGood luck on your design, but very soft probably gave you the best shot on your current design.