@Neyawn sir, i know it's bit late to suggest but instead of no negative marking for last 5 questions of CSAT i think no marking at all would be better for CSAT questions like just count 45 questions for the marks leave 5 questions of CSAT to self evaluation.
That will result in two things
that everyone (almost) will check the detailed solution as it will not be checked as some might ignore it
it will keep balance with subject wise tests like in geography you will get what you get i mean that extra 10 marks might ignore the importance of our actual need of reality check which can lead to ignorance of topic i mean if someone gets only 30 in Subject still one will get 40 if it's CSAT does all good hence the actual result will not hit him hard as it should
and lastly it will simplify the OMR evaluation for the forum itself.
Hope this message reaches you