Sadly there's no way to put the update functionality back on a par with Windows 7/8/8.1, but these steps will give you much more control and is how I've been managing updates since the Win 10 preview builds.
1. Fire up the local group policy editor. Local Computer Policy > Computer Configuration > Administrative Templates > Windows Components > Windows Update. Open Configure Automatic Updates, set the policy to enabled. In the options box set "Configure automatic updating" to "2 - Notify for download and notify for install", then click "ok". This then means you will receive notifications, but it won't install updates without you pressing the update button. Note it may take a reboot or two for the policy to take effect. You'll know it's working if you go to the Windows update page of the settings app and at the top it says "Some settings are managed by your organisation", the message is due to group policy mainly being used to manage computers on domains.
2. Go into control panel (not settings) > system > advanced system settings >advanced > hardware > device installation settings. Set "Do you want to automatically download manufacturers apps etc" to "No". This will allow you to update, but windows update should then not replace any existing drivers.
3. For even finer control, google for "Windows 10 hide updates". See https://support.microsoft.com/en-us/kb/3073930 . This will allow you to install an MS hotfix that allows you to selectively disable any current updates including drivers before pressing the update button if you've completed step 1 above.
