Its a wild asumption that Larian sudently change their mind about something people keep complaining about for last 3 years with no response at all.
Larian make a point of not commenting on anything on the forums - if you want objective feedback it's a good idea not to influence the discussion!
Sneak attack worked the way it did in EA for technical reasons - they had not yet implemented the tech to make it togglable. Not because "Larian hate D&D rulz".