Larian did decide that being able to learn abilities of types you haven't spent any skillpoints on was an exploit, and thus removed it, and I had that listed.
This was a good call on their part I think. It wasn't intuitive, removed much of the impact of point distribution, and forced a lot of my playthroughs to have seemingly odd builds until certain +1 skill boost items were found.
However, it's still possible to learn a large number of skills with no investment via Corpse Eating.