Pros and cons of ios7? I still have ios6 on iPhone 5?

I have an iPhone 5 and I'm still on ios6.1.4. I still really like the 6 but no one I know has it and I feel left out. Am I missing something? What are the pros and cons of the 7?
The only reason I'm considering it is the phone number blockage. I have an ex who's still bugging even though I have told him multiple times to leave me alone. That's the only reason why…
So is it worth it to update my phone? I haven't had any problems so far with my 6. The only thing I can think of was that I was unable to download 1 app due to my current version. So should I do it? I'm a little scared lol

Will I still have my iphone backup if I restore my laptop?

I need to restore my laptop because it has a buttload of viruses on it. I'm moving my important documents onto a 500gb flashdrive before I restore it but when it's restored will my iphone remain the same after syncing it or will it lose it's backup?

Why won't my iPhone 5S downgrade to IOS 7.1.1?

I updated my iPhone to IOS8 beta 2 a few days ago, and found lots of bugs which are starting to bother me, so I tried to downgrade to IOS 7.1.1 using the IOS 7.1.1 ipsw file for my iPhone GSM (A1457) phone, but everytime I try to restore it using iTunes, I get the message "the iPhone could not be updated because the firmware file is not compatible", so after that i decided to download another ipsw file from another source and it said the same thing, and I just don't know what the problem is.