Originally Posted by DragonSnooz
To be clear, collision detection + other previously stated terrain benefits.

Originally Posted by linkezio
...so why not make up for the advantage/disadvantage rule? Apart from the other benefits of high ground that I've already mentioned.
Could you clarify what you're asking?

I already said disadvantage from low ground is a composite for cover (so we have it accounted for multiple times).

In fact, disadvantage increases the chance of critical misses and decreases the chance of critical hits.