That's not necessarily inaccurate. smile The boiling point depends on both temperature and pressure. Not saying there aren't exceptions, but usually when I find liquid (and assume it's water) above 100C it fits the phase diagram.
Sulfuric acid is a product of high heat. A "Arctic Venus" is what I suspect a large share of hot terras to actually be. In general I just hope that liquid classes don't get tied to planet class in the future like they currently seem to be. (Titans having liquid hydrocarbon seas while Terras have water). Liquid class is important since it would have additional factors for the generation of the world due to how liquids affect terrain. Worlds with liquid ammonnia oceans are unlikely to have ice caps for instance. Acidic worlds probably would have flatter terrain generation (as acidic rain would corrode the landscape much harsher than water does).
World composition is another factor that seems a bit absent beyond silicate/ice. Carbon and Iron compositions seem to not exist. An exotic type of world that may exist are iron worlds with sickly yellow carbonyl seas.