Hi Farhan,
That's the point: In the old form views I can add all kind of available activities through the Ribbon. But when I use the new form it only allows me to add activieties in the social pane and there only for phone calls and tasks. I don't see anywhere a possibility to add others like I could with the Ribbon.
Hope I understood you right and this is the answer to your questions?!
Regards,
Thomas