Currently, when you check off a checkbox as completed on an Evernote checklist, the entire line is grayed-out and struck- through. This makes completed items really hard to read.
One often needs to be able to read the completed items, for example to confirm that an item was actually on a To Do checklist to begin with. And it's frustrating trying to read through the pale, struck-through font.
I would suggest making the strikethrough formatting on checked-off boxes optional.