To be fair; if you stick to the main quests in the base game you can "skip a lot".
I'm still in my first run, taking a HoS detour now, will start BaW when it arrives, and finish up the main game after that
Everything sounds fucking amazing. The book change (press a button to read the book or note you just picked up) should have been in the main game from the get go. I admit that. The fact that they are willing to change it this late in the game is still great. Most dev's would leave it the way it is, focus on just new content for the expansion. All of the changes sound great. New grass is exciting (as lame as that sounds) they talked in a preview event before about possibly going back and adding that grass to the full game.
Here's the armor Ursine armor upgrades that they mentioned didn't make the final game
Also the option to turn off the fish eye witcher sense is incredible. One of the biggest problems with the game considering how often you need to use that mode. God bless you cd projekt red