I don't miss level scaling, but currently, the game has a really big flaew for me, due the fact, that you can nearly "faceroll" everything in the game at a certain level.
Currently, I'm level 32 and there is no challenge. I switched to the highest difficulty, but... nothing chaned. Enemies take more hits, Geralt less, but in the end, that's nothing. Cast a few Igni = enemy is dead. Cast Yrden = always hit the back of the enemy and laugh. I mean, I need to cast 2 Igni (with the damage due the fire) and a monster of the same level is dead with no resistance.
I'm nearly at the end of the story and I have no idea, what I would do after this. I don't like the idea to explore all these locations with low level enemies.
I want a NG+ option for the game. The highest level ist 70 , so, there would be enough space. With certain options, it should be a good solution. Locations, you've explored in the first run, will be explored in the second too. You only need to go there, if you do a quest or if you want to go there. Gear you have, will be transferred. There could be schemes to uprade witcher school sets to the current new game (for example: Tier 1, 2 and 3). They should have a "lower stat scaling", so you don't encounter the same problem you've in the first run.
Also, you could do things better. For example Gwent: Currently, you need to play the game in one way to get all cards. With a new game+ option, you have the chance to collect the last missing cards, without playing the whole session in one way.
Maybe, I'm too much spoiled by the Souls games, but I think, a new game + option would be great for Witcher 3.