re: Crackpot ASOIAF Theories SPOILERS

Honestly, I think Tywin was planning on shipping her back to the Rock as soon as the Wedding was finished. Tywin knew he had to let Cersei be there for the wedding and the unexpected trial, so he delayed her likely planned removal. If Tywin had lived to the present, he would have for sure sent her back to the Rock after the clusterfrick of raising Joffrey.

He would have still tried to marry her off from a distance, but I think that the only child that Tywin really realized what she was was Cersei. He knew she had to leave Joffrey and the realm behind, or they were doomed. It was really the decision listed above that I'm sure destroyed his opinion of Cersei, and he wasn't about to let her anywhere near power again.

And Slynt was lucky that it was Tyrion who came down and not Tywin, because Tywin would have probably just killed him off instead of sending him to the Wall.

All of this

Tyrion and Tywin make mostly the same decisions. Tywin only hated Tyrion cause he's a little guy. If the other 2 kids acted like Tyrion, Tywin would love it.

That's why Tyrion never "accidentally died" Tywin needed him to maybe rub off on the twins