Another vote for stitching!
The only other aesthetic adjustment I'd make (which you totally didn't ask for comments on) is to move away from the squared-off sheath top/mouth/opening. To me, that style looks like it was just chopped off with a paper cutter (not just yours, any done this way) compared to the pretty curves on your blades. Having some sort of contour there will also help your scale-fronts slip into the sheath easier, without affecting retention in a negative way.
More power to you for being willing to do hand-stitched leather!

I gave up holster-making in part due to the excruciating finger work (investing in upscaling your tools I'm sure helps).