There is a slight blur on the snap editor
Uh, yeah. That happens normally. Nothing to worry about. I think it's an issue with the rendering of Snap!, Browser side.
Try pressing that little magnifying glass icon, and a popup should show. Press "Reset" and it will be back to normal. 
blurs worse
Shift click 
icon > Enable Retina display support.
ok my snap opened with retina support tyiwu