From a design stand point I think that the real question you should be asking instead of 'what should be added' is 'what can we remove'
Remember that people are going to be coming to this website and they want it to be Easy to Understand and Easy to Access. When I load a website and the first thing I'm greeted with is a page who has 80% of its text set to Bold, I struggle to understand where to look first, and what is more important than other things.
I would highly highly highly suggest removing the bolding from the Left Sliders because it starts to fight the Main Content for attention. (people see the bar and will know what to do with it, you don't need to make it shout at them)
Other than that I think it comes down to just spacing. The website is very cramped if you put everything in a box inside a box inside a box inside a box. (this is fine of course, but your borders are set to a very heavy weight.) I'd suggest lowering the weight of your borders to about 1-3 pixels tops. Use a thicker weight (3) to separate main parts of the website from other elements, but inside of elements themselves use a lighter weight (1) so that people will recognize that they're still within the element, and not starting a new one.
I promise I'm not being harsh here, just a simple User-Interface opinion