Forget about books and stop adding in features that make the SP and MP Cooperative ways of playing the game better?
No thank you.
There are literally hundreds of games where PvP is the main focus and SP is the token afterthought, and truly cooperative gameplay is nonexistent. We have this one game where the roles are reversed and PvP players have to chew on the leftovers. Well, I'm not inclined to feel much sympathy about that. 7 Days to Die is a single player and multiplayer cooperative game that can also be played PvP and not the other way around.
Could've The Fun Pimps followed the money and just gone full on PvP? Sure, but they didn't and don't plan to. They have carved out a great niche for themselves and are happy with the success they have and will at some point look at what can be done for PvP-- as long as (and this is important) it doesn't conflict or harm the balance of the SP and cooperative gameplay.
Now, you might say that fixing the clipping and other PvP issues wouldn't harm SP or cooperative gameplay at all. It would help those modes of play also. Thing is, they are irrelevant. Why would I ever be tempted to clip into the terrain and look around underground in SP? Spending time fixing every conceivable way to clip into the terrain would take time which you even admitted by saying "Stop it with the books and fix our issues". You know that it is a choice of how to spend time and resources and since taking time to fix things that don't have any effect on the main game modes of play would harm those modes by taking away dev time to not add new content-- the fixes you want will just have to wait.
I know your frustration, man. I feel it with almost every other game on the market that has a robust PvP experience and a ♥♥♥♥ty SP campaign that was obviously tacked on for the smaller market who doesn't PvP.
Role reversal can be a female dog when it happens.