3/4/5. I don't know why this would need to be a hard/fast rule. Casual is a social contract, you shouldn't need to formally tell people to not be a jerk if the group finds the play style frustrating.
6/7/8/9. That is... basically all the removal options outside of destroy/damage. I get the distinct impression that you're still pretty new to the game, but I can assure you that removing all of the means to stop combo is NOT going to help make your format more casual.
Sure, you decided to get rid of Storm, but what do you do against Show and Tell -> Emrakul?