I suggest you empty your cart and start again with a single Orbx region. Which one depends on where you most want to fly, but take the Pacific Northwest as an example. This will do the same as the Global Base and Vector products, but better - though only for that region. It will also upgrade all the airports in the region to better than default. I think this generally means correcting runway orientations, elevations and blending into the landscape, plus adding some generic furniture such as buildings and parked traffic where the default doesn't have any.
Global Buildings will overlay better generic building textures on autogen buildings. I presume terraFlora does the same for vegetation, though I have the Trees HD product instead.
It helps to know that the Global Base and Vector products are derived from the specific region products. In other words, they don't add anything to the regions, but they 'borrow' bits from all the Orbx regions and use them in a generic way to make the rest of the world look better than default.