I agree, anything to make it less RNG and more skill is a positive in my opinion.
It definitely could change the dynamic of the game if shotguns were more consistent with damage output. Even I'm not sure if the community would be for or against something like that, but I don't think adding one more room tag would really frustrate anyone, at least it would give people a chance to see if they like it more/less when the random factor isn't so big in fights.