Your earlier reference to seeing the Race Stuff / Archetype stuff. Each Class Archetype AND Racial Trait required lots of man hours to get the display we enjoy and use today (Most of it logged by myself). The Racial Traits you see are all coded in by hand to give you the view. Swappable items are the name of the game. To get those items to populate required special Coding, on top of the fact they needed to be swapped out easily.
In order to 'show' all those abilities, would require a Massive rewrite of every single ability. You need to shove it into a user pool. All instances of 'ABILITY:Special Ability|AUTOMATIC|x' would have to be changed to 'ABILITY:Another Pool Name|AUTOMATIC|x'
That is a lot of effort, prone to causing a bug or three if not monitored carefully, just to display something in the tabs where we have users select items. And you can't do a blind rewrite as certain abilities shouldn't be displayed. Having essentially a Read Only Pool seems a bit overboard - the effort to do that takes away from another project or bug fix, like say Ultimate Combat isn't getting attention while I investigate each bug. Now, you've mentioned that Sneak Attack isn't displaying it's Value, that can be rectified fairly easy. Just open a JIRA and I can fix it. Takes all of 2 minutes.