I tried DynamicActorLoader few years ago - it screwed up everything...maybe I did something wrong...
Also: are you saying to add UTPure to the mapvote as a mutator? (Asking because for another gametype I tried to turn it off by CustomGameConfig settings
in mapvote last year and it did not work.)
I am using UTPure for several reason, e. g. stopping behindview and the NO-Shadow tweak.
So the PureSwitcher seemed a nice thing - if it would work.
Also, few years ago there was a problem with Pure kicking for TD - TimeDilation. It was caused because mappers had raised the Timedilation in the maps in order to show them longer (or something like that
Setting Timedilation back to 1 fixed this.
Maybe there is something similar for the Bad Lighting?