You will run into more problems when going backwards to Windows 7 as all OEM, UEFI machines (as most are these days) preinstalled with W8 will have Secure Boot enabled. Secure Boot is an advanced security feature that prevents badguys from circumventing the installed OS with another OS.
While W8 has a fairly steep learning curve, it is a much better OS in terms of security and performance. And while W7 is an excellent OS, I would urge you to stick with W8 as that will carry you further, and more securely into the future.
If you insist on putting your systems several years behind, see switching back from Windows 8
To answer your original question, W8 drivers use the same "driver model" as W7 so in theory
drivers should not be a problem. But unfortunately, theory and real world don't always jive.