Some people just forget that his game, by design choise, is an RPG, and NOT an action game. Sure lore wise, Geralt is the best swordman in the world, so to be faithfull, you should start at something like level 30. You can make an argument that the pre determined character of Geralt is not suitable for an RPG, but nevertheless, CDPR decided to make these games an RPG from day 1, and personally i am glad. So yeah, inconsistencies with the lore will happen in an RPG enviroment, but, at least in my opinion, the game is far more interesting as an RPG.
No on topic. Level scaling sucks. SUCKS. SUCKS so much i can not even put it in a proper sentence. It sucks so much that i have nightmares. The problem is in TW3 is the lack of difficult/challenging combat towrads the end game(maybe mid game even), and NOT the lack of level scaling. The next problem is quen. If they change quen to absorb like 25% of the damage, and abolish the broken second form, i bet my ass that a good 80% of the complainers about the game being so easy(which it can be), will beg for mercy and complain cause the game is too hard.
THe skyrim comparison is way off. Scaling or no scaling, in skyrim you can be SO freaking OP it's not funny. I still remember getting 100% spell absorbtion, resulting on every magic attack in the game, including dragon fire, and dragon priest attacks(basically the toughest enemies in the game)to deal ZERO damage to me, and regenerate my mana instead. LOL. 400% Igni sign intensity with fully upgraded quen and axii feels totally balanced compared to that.