I'm not sure exactly what you are saying here?
Sneak attack can be selected as an active ability, it is true, but still only fires if the conditions are correct for sneak attacking. Personally, I never use the active abilities though I guess having them there might be helpful for new players as it helps identify when they can and can't sneak attack.
But there are also the options on the Reactions tab that we can use to set up to either automatically sneak attack when the conditions are right. That's a much better way of using the ability, as it also fires on offhand attacks and when using special ammunition or attacks, unlike the active one.
Are you suggesting that the option to select it as an active ability is removed, or that something more is added? And if so what do you find missing about the Reaction setup?
There's a thread at
https://forums.larian.com/ubbthreads.php?ubb=showflat&Number=880668 discussing the sneak attack implementation in the full release, so I'll just lock this thread to avoid duplicate discussion and you can add any further thoughts you have there.