X2 on some of the above and sometimes you have to use what you have versus what is designed for task at hand.
I think many manufacturers use the wrong words (root grapples/root rakes vs. grapple rakes)
Around here we would describe a grapple rake is what you need for the job. (not a root grapple or root rake) Where grapple rakes have tines that allows the grapple rake to actually lift materials above ground level and skim the ground with minimal damage. More or less flatter bottoms and longer tines.
You probably already tried this but would suggest you try and increase curl down much more than your pic. shows and run tines just above the ground when not wanting to disturb the ground. Skimming ground w/o damage on your design is going to take more technique due to the design.
Grapple rakes more like this less ground penetration and kinda skim the ground easier
where root grapples more ground penetrating like yours so lots of technique needed to skim.