How users are getting benefitted by hiding the hidden windows from Mission Control?

Some important features (such as showing all windows including the hidden ones) of Expose is not available in Mission Control which replaced the former in the recent versions of OS X.

If this decision of Apple is not an accidental mistake (I think so because this is happening through 2 or 3 successive versions of OS X), how users are getting benefitted by hiding the hidden windows from Mission Control? (Why Mission Control should not show all windows, by assigning appropriate styles to the hidden and minimised ones?)

WhatsUp Gold 16.1 - Mac OS X Active Monitor

I use WhatsUp Gold 16.1 systems and I am not getting to monitor memory How can I see memory usage of my Apple Mac OS X devices, in real time on my Dashboard?

How can I see when the Spotlight index was re-indexed for the last time?

How can I see when the Spotlight index was (manually) re-indexed for the last time?

User file very big

my users file in macbook air 11" is 30 GB. How can I free up some of this storage space? I can't upgrade to Yosemite until I have more free storage.

Where should I place shared folders on an OS X Server?

What is the appropriate/reccomended location in the drive hierarchy to place the folders shared by the users accessing the server (as fileserver) ?

Is it in /Groups /Users/Shared or ~/Documents/ ?

Or should I create a separate folder in /Users for each group ?

Is there a document/webpage that supplies instructions about that ?

iOS8.1.3 will not update

I have the iphone 6 and it will not update, it gets as far as the terms and conditions screen and will not go any further. Have tried turning the phone off and on but still the same. Have also done the two button reset but still no joy.

How to know using which account download clash of clans i aaps store apple

i am playing clash of clans on my ipohone 3s n now i want to change my device to samsung Galaxy grand2. when i want to link my device it is telling that the game centre id is not matching. please help me how to know that which id i has used to download the game