good suggestion but its a 24 coach train.so adding extra coaches is not possible.As its a vip train it must have some more a.c coaches.As it is having more number of gen coachesNER should remove 2 gen coaches and replace it by one A.C 3tier and one A.C 2tier.
as the demand of gen coaches is also more for this route some more gen coaches should be attatched to 12107 and make it 4 days a week