I am not experiencing any of these problems, but I have encountered freezing and actual crashes on occasion that led to me restarting the game.
My biggest pain point at the moment is just the general responsiveness of the game particularly with sims performing actions, waiting or doing.
I would try everything that EA's support team suggests just in case it is an issue with your system caused indirectly or directly by the game during installation or an update. If it was a significant break that has been introduced in the game, then I would expect everyone would have the same problem but this does not seem to be the case.
Although frustrating, I personally have not encountered anything truly game breaking and I suspect over time the stability will increase and lead to a much more smoother player experience.
I am running it on the PS4 also.