The release date for Windows 10 is getting closer and closer by the day and even now, the majority of the larger bugs have been squashed by Microsoft. One thing we just can't understand is the lack of features in some of the new 'Metro' or 'Modern' apps. For instance, take a look at the mail app: 

There's nothing "wrong" with it. There's nothing to complain about, but it lacks substance. All those features we use on a daily basis, like moving emails, marking as spam or archiving, are all hidden behind a pretty icon. 

I also tried selecting multiple, or even all my emails using shift, a pretty standard Windows feature. The mail app had none of it and allowed me to check one email at a time. With over 1400 emails, this is quite counter-productive. Another feature left absent, was a 'Select All' button, something very useful for bulk moving emails.

  
Adding these folders means they're no longer nested! This is just madness! 

I wish I could add extra columns, like a recipient column. There I can see, from my 4+ email addresses, where my email was sent to. 

Really, I can't find anything wrong. It's just not there. It seems, like everything Microsoft, it's getting more and more simplified, hiding features, or completely removing them.