Frankly I am not so fond of the microSD approach: think about having to open the case, take out the SD card, copy a file to it, put it back and close the case…
The current procedure is really only problematic for Windows 8 (and perhaps also the latest Windows 7 64-bit) users. The driver works fine on other Windows versions. The main issue with Windows 8 is that it enforces signed drivers, the only way to get these open-source drivers installed is to reboot the system into a mode that disables driver signature enforcement. It’s doable, just involves more mouse clicks.