You will still have access to the full-sized sd card slot.
Also, yeah, talkback might not work as well as one may think. At least on the current Touch. That being said, remember that Keysoft is a heavily expanded, customized talkback apk.
Technically, so is Easy Reader Plus. Dolphin collaborated with Humanware on that one, to add in more features and make it more braille display friendly (you still have most of your braille keyboard shortcuts from Victor Reader Soft.) So no, they didn't just put in another app in a hurry, this is a fully featured daisy reader that isn't clumsy in the least.