This is pretty much how I do it.
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It does, but it really isn't. I prefer using a controller to mouse&keyboard--especially on fights like Titan, where being able to quickly and precisely move around is of utmost importance.
I use a PS4 controller on the PC. Other than some initial frustration until I saw how to edit the ffxiv.cfg file, it's great. One downside is the battery seems to drain pretty quick when using it on the PC compared to the battery life you get using a PS4 controller with a PS4. It's probably just lack of decent driver support, which will hopefully get taken care of at some point.