Now in new Central, there is big Add Tools button which switches central to Software/Update page.
Now, I can imagine some people struggling with switching back to Central form Software/Update page. The tabs on bottom are easy to overlook (when it's ones first encountering with central). It would be good IMHO to have some "back" button on Software/Update page.
With old central it was OK, because switching to Software/Update page required user to notice those tabs on the bottom. No one can be completely unaware of those.
What do you think?