Not trying to be negative here, but I was thinking back to this for a little while earlier today.
The thing I disliked possibly the most in Divinity 2 was how there weren't really many skills. One of my favourite things about Divinity 1 was that there were a ton of skills. I felt in Divinity 2, it was dulled down. While I had my choices, I found that on my run-throughs, I did not really want to change my choice of skills. I picked carefully, saving on a level-ups and testing the first level of a skill. If I did not like a skill, I would take another, which usually wasn't the case. Therein lies the problem I found, it's not that I did not have options, but just not enough options. While the potential of creating a hybrid character is undoubtedly there, for each typical type of character (warrior, archer, mage), I found it kind of hard to create variation. In Divinity 1, I had several passives, several spells and active skills so I had fun while going new characters a lot more and finding out what was best.
I generally dislike weapon masteries which you put points into, it limits you to using a certain weapon for the best damage, which means that shiny new powerful item you just got is basically useless because you get bonuses from big hammers and hammers are the best! Infact I think an 'Attack' mastery is good enough. You are better at fighting, you don't need to re-load again or complete another quest or open another chest to get something which is useful.
Anyway, I could ramble on all day. So, those are my thoughts on this.