meetdilip Even if the functionality to add such statistics were to be included in the default Flarum installation (which could happen), it would likely go in an extension. Doing so would make it easy for admins to turn it off if they don't need it, or perhaps replace it with a "Moar Advanced Statistics" extension, should someone come along and decide to create such a thing.
Come to think of it, one of the statistics that you have suggested as an example...
... couldn't possibly go in the core, because likes aren't in the core. The ability to give and receive likes is supplied by an extension called "Likes". ?
Have a look at this page for a more detailed explanation of core versus extensions.
