I had a grafted tomato plant in a container on my patio this year. I also had a hybrid cherry tomato. The cherry tomato produced like gangbusters and is still going strong. I got ONE tomato off the grafted one. All the rest developed blossom end rot. Every. single. tomato. I finally got rid of it yesterday.
I thought the grafted plants were supposed to be resistant to things like that because they were grafted onto a hybrid root ball?