How to read this: the blue bar and hex row show a terrain movement rating from blocked to best access. This is an at-a-glance terrain advantage summary, not a unit's full base MOV stat.
Current source limit: Walker and Leviathan are mentioned in the current design source, but their full per-tile movement math is not yet fully specified there. This page shows the movement types that are fully grounded in the current source and marks inherited terrain variants separately.