Anything physics related is usually not just a simple matter of changing one setting for someone else's preferences.
You can change the table slope in the editor (change from 5.5 to 6, etc), but that may make the rest of the table not play correctly, as many parts of the table are tuned for a specific slope, and the physics settings are also tuned for this.
So you can try adding more slope, but expect some things to possibly not play correctly.