Some question about mesh decals

Hello

I was trying out mesh decals, they work ok, but I wonder if I could improve my workflow.

As you can see on this picture the border of the floating mesh is quite visible…

I wonder If I could blur it somehow. I could use an opacity mask around my normal details, but I hope there is an other way to set this up.
I also wonder if there are any trick to make these details stand out better… give them some slight color or roughness change for example which blend in nicely…