Like how WTA/WTD or effective bonuses are already included in the calculations, but those have arrows and flashing icons? Or the weapon icon being shown at all, if it's just the numbers that matter. Note, all of those things are smaller than the main combat numbers, because they're less important information but included in case you care to see them
And then any case where the terrain numbers won't act normally, where it's useful to see the how they're changed, since no where else shows that: mounted/flying classes, Parity, Starsphere effect, the Ranger mastery, any other cases that might come up
It's not a choice between those and a gauge or number for skills, I just haven't got to skills yet. And because, other than the Jagen, nobody will have access to them for a while in the main game it'll be some time longer still. But in the meantime Myke will be going over the window and interface design and revising how each piece of information is shown, so it's prudent to wait for that anyway