Yep and that is the reason why I have stopped playing.
I was pretty worked up too, but honestly the only quests affected are a few in the Novigrad region. Mostly main story quests.
I played through them and I am now in Act 3 and still about 5 levels higher than the main story quests recommended levels. I got exp for every quest in Skellege and beyond.
It's annoying, and frustrated me at first. But honestly in the end you might loose a level or two at max from the missed experience, and they barely matter.