Wrong catch. If a complete newbie to RPG regards the fights as easy after his learning curve, the figths ARE easy.
No, it means you became less of a newbie as you played past Cyseal. And I said the game is easy in the second half. But it's not a cakewalk.
I don't think it has much to do with player skill in this case. Near the end of Cyseal, you have enough diversity in skills to be able incapacitate the strongest opponents in any given fight before they get a chance to act. It doesn't take much skill or planning to most fights from that point onwards.
The Source Difficulty mod has a smarter approach to this issue by rebalancing SPD/Willpower/Bodybuilding/skills for most enemies so they would not be trivial to remove from combat. I expect Larian to take the same approach to their "harder" difficulties as well.