We can't do everything at once, one step at a time. Security is pretty much taken care of, so now we mostly deal with usability. And we've got a lot of ideas and thanks to our users great suggestions. So don't worry, we'll make it easier to use, just one step at a time.
Isolated programs can't install drivers, they don't have enough permissions for this. Drivers require digital signature to be loaded by Windows, so hacking the site, infecting and resigning drivers is possible, but unlikely - too much trouble. Besides quite a few software have and really need drivers. Usually simple exe files are compromised, they have similar access rights when executed from admin (which most users do) and don't have to be signed. But if you really have to deal with a driver, my advice-think twice, do you really need it? Sometimes even legitimate drivers are full of bugs and increase attack surface.
Folders monitoring is not hard, but drivers can be loaded from any folder, so in this context this monitoring will be quite useless.