Analog stick and trigger deadzone, range and input lag!

[ghost]

OS Windows 10
RetroArch 1.15.0
Core 1.29.0 (6625d33)

Those options seem to induce an additional deadzone and input lag.
Like Beetle PSX, Beetle Saturn seems to manage deadzone of our analog controls (stick and trigger) by default and mednafen doesn't offer those options.
May be, those options should be removed or setup on 0.

Some additionals opinions would be usefuls.