You could have a patch like this, then adjust to what you want. I did add in a few items.
@PART[Large_Crewed_Lab]:FINAL
{
@MODULE[ModuleScienceConverter]
{
@dataProcessingMultiplier = 0.5 // Multiplier to data processing rate and therefore science rate
@scientistBonus = 0.25 //Bonus per scientist star - need at least one! So 0.25x - 2.5x
@researchTime = 7 //Larger = slower. Exponential!
@scienceMultiplier = 5 //How much science does data turn into?
}
@ModuleScienceLab
{
SurfaceBonus = 0.1
ContextBonus = 0.25
homeworldMultiplier = 0.1
}
}
Lowering the dataProcessingMultiplier would slow the data processing thus the research yield you would generate per day. So yes it would make research gain slower and longer to process data.
You could just put the scientistBonus to 0.0001 value. This would make it so the difference between a level 1 vs level 5 scientist was negligible.
For researchTime, I tried a value of 100, and it threw no error when I tried. So I don't see why you could not, It does say it is exponential so a value change could have a big result.
Here is the Wiki on the Lab and science calculations.
https://wiki.kerbalspaceprogram.com/wiki/Mobile_Processing_Lab_MPL-LG-2
https://wiki.kerbalspaceprogram.com/wiki/Science
These do a better explanation then I could write here and might help.
Well you have 52,450 System.NullReferenceException.
It looks like a bunch are from the BonVoyage mod. You are currently running the version for KSP 1.3.1.
BonVoyage v0.13.2.1
Version 0.13.2.1 for Kerbal Space Program 1.3.1
Version 1.0.1.1 for Kerbal Space Program 1.8.1
Looking at the other mods, it seems many of them are out of date also.
Like Kopernicus, it is not out for 1.8 yet and is version locked.
My suggestion would be to do fresh install and use CKAN to install 1.8 mods.
If you want Planet Packs, you will need to revert to a 1.7 or earlier version compatible with Kopernicus.
Precise node is max 1.4.1 Version. I will assume you are on 1.4.2. On CKAN to the right of Apply changes, what is your Filter set too. You should be able to see All, Compatible, Installed, Upgradeable and some others in a drop down menu when you click on it. What is it currently set too?