Also not new. Have that in iOS 10.3.2. For links being in new tabs or background.New option to open links in new tab or in background. Also in Safari settings, there have been some small changes such as, "Try to Prevent Cross-Site Tracking" has been changed to "prevent Cross-Site Tracking". This may mean that they figured out how to actually do it, instead of just trying. And, "Block New Cookies And Data" has been changed to "Block All Cookies"
As to cookies, that was present in beta 1.
Can't comment on Cross-site tracking.