Rain value 0.2 certainly creates puddles
You can use the '_render_drop.xml' to reduce the rain for Overcast. Mess with the fade, local light & distortion values, maybe 'textureRowsColsStartEnd' also, can't quite remember .
The 'rainstorm_emitter_ground.xml' controls the little tiny splashes of rain that happen when the rain drops hit the ground. There's a bug where they can sometimes appear floating in the air, so I have removed them from my game for that reason & a cleaner look also.
You can certainly get what you want, years ago I messed around with the rain for lots of different effects, everything from slow very light rain to full on hurricane. You'll just have to find the right balance of settings.
Global rain settings in 'visualsettings.dat':
#Values for rain GPU particle effect rain.NumberParticles 2048 <!-- very subtle visual effect reducing this, but can increase performance without much visual loss --> rain.UseLitShader 1.00 # rain.gravity 0.00 0.00 -0.98 rain.gravity.x 0.00 rain.gravity.y 0.00 rain.gravity.z -0.98 rain.fadeInScale 2.00 rain.diffuse 1.00 rain.ambient 0.40 rain.wrapScale 0.60 rain.wrapBias 0.40 # rain.defaultlight 1.00 1.00 1.00 rain.defaultlight.red 1.00 rain.defaultlight.green 1.00 rain.defaultlight.blue 1.00 rain.defaultlight.alpha 16.00
There are rain drop & distortion textures in 'fxweather.ytd' you can mess with also. I have my rain drops a lot thinner than the vanilla ones, which gives me a lot more control over the final look