I often like to choose different translations to memorize different passages, depending on the way it's worded in each version. Although Verses supports six translations (which is great), there are times where the preferred translation is not one of those six. Having a way to add custom text for a passage would make it easier to memorize verses in the translation that best fits the user.
I also like to translate verses myself and memorize my own translations. So it would be great to add custom texts.