To put it bluntly, I don't like cheat skills in isekai. The author has built a whole world around the fact that levels can even get a goblin to the level of the demon lord. I believe it has been heavily implied that the demon lord and the goblin can go toe to toe, although the goblin does have her weaknesses to magic.
All that world building, just for it to be broken by two cheat powers. I can sorta understand the case of Aki, being an otherworlder and such. But Granite just doesn't make sense. Levels can bring a goblin to the same league as the demon lord, but if you have special abilities you basically can ignore large level differences? If a level 21 mage can beat a level 49 even with an element disadvantage, I find it extremely hard to believe that a level 70 hero with a full party couldn't beat the demon lord with a few "geniuses" in his/her team. Since there are just so many heroes around, it is implied that the demon lord has been around for quite a while as well. It just doesn't make sense for the demon lord to still be around if levels are just for show in front of special abilities (and note that Granite probably just has more mana and better affinity with ice than the average mage, and she still manages to beat someone with double the levels).
I am taking this comedy manga too seriously, but it just bothers me so that the cheat abilities are introduced.