Thanks. So that's what other already said, there is nothing more. This was a really minor issue, I don't see why it would make anyone that much happy, but it's sure nice to have it fixed.
It also gives you a live preview when you use C-x r t to insert text, like iedit-rectangle-mode always did (iedit is still more robust, but for most simple cases I use C-x spc now instead of it).