I guess I can see that. However, my use case is different. I tend to use Evernote as a scratch pad for things I need to remember, like passwords, lock codes, lists, etc. So, I'll pull up a note, look at it to get the info, and then just stick my phone in my pocket, forgetting about it. Since the Samsung has the Smart Stay feature, if I want to look at it longer, I can.
I know some people don't have Smart Stay (and it doesn't work well for everyone), but it would be nice to have the ability to turn Evernote's "stay on" feature off for those that do.