The ratings of the buildable of one map should not be weighed in comparison to past buildables, but rather as objective evaluations of their own effectiveness and what they bring to zombies gameplay. I can't just give the MTAR an 8 because of the existence of the SMR. The MTAR compared to the Ray Gun Mark II on the other hand would then look like a 4 or 5, and it would make the RG Mk II look like a 10. Ratings can only be comparisons if you're ranking things, in which case each item would follow the last consecutively and in order. Otherwise, comparisons should be limited to references to other weapons/objects, and should have a much less significant impact on the rating.