So my girlfriend didn't know about updating her iPhone 5s software and left it on 7.0.4 that it shipped with. Should we now update it to 8.1.1? I'm seeing reports that the phone will be a tad slower but obviously will gain some features. The thing that is pushing me to iOS 8 is that she will get the security updates missed by staying on 7.0.4. I've got a 5s 64GB that is staying on 7.1.2. Luckily I updated her iPad Air to 7.1.2 at some point, and it's also staying on that. What do you guys think?