Day in and day out, using an identical shaky head worm or Ned rig in clear water, you will get more bites using 8-pound line than with 10-pound line. You'll get even more bites using 6-pound line, and more still using 4-pound line.
And before anyone starts talking about rate of fall, I'm talking about purely dragging the worm/Ned slowly on the bottom.
We are never going to wholly agree on this subject but the above is based on my personal experiences on the water and that should outweigh everything else for all of us.