Too complex in the sense that GFUI refused to engrave it.
As for your resolution comment, we can try exporting @ 450 dpi & observe how it compares to exporting @ 225 dpi. Thanks for the suggestion.
We have been leaving GFUI’s lines-per-inch at the default of 225 because we assumed the Glowforge company had found that any higher setting wouldn’t provide any noticeable improvement (but would slow down the engraving).