It’s just a little annoying, it seems like out of the blue I’ll just have to re sign in, or re enter my password for things that don’t really need it, like looking at my stats. I’m not sure what’s there that you can change, but it makes for a less seamless experience.
I, too, find it rather annoying that one has to sign in to view the Halo 4 stats app.
It’s especially problematic there because any information in the URL gets wiped when you sign in – if you click a link to view someone else’s stats, or to view a specific game in someone’s Game History, you’ll instead be redirected to your own stats. Links will work after you sign in, but it’s a waste of time and bandwidth.
While it is annoying, I won’t complain about security checks.