Low-er? High and low are relative adjectives almost everywhere they're used. C is a low level programming language relative to most other programming languages; it has fewer layers of abstraction than say, Java. In a conversation discussing x86 assembly, LLVM IR, and C, then C would be high level. But that's usually not the conversation being had; there are a hundred times as many Java programmers as there are x86 assembly programmers.

We don't need a new set of terms. Relative terms are fine, they're just context sensitive.