I'm still not clear what's going on in this thread.... for all intents and purposes *I* am right now keyboard only, and have no problems:
I can turn, I can run, I can target, I can select my party mates or an enemy. I can use all my skills. My fingers never leave the keyboard.

Can someone here say exactly what they are trying to do that they can not accomplish with keyboard-only?

So far I know there are some challenges (but not impossibilities) with the following action types:
1) Placing -- Hard to place a fairy/AOE-ground-target skill with keyboard only. However once I place it with mouse, usually next time it appears in same spot. This is a room for improvement, but hardly a giant issue.
2) Targeting a single mob in a crowd -- True, using tab amongst 10 things is slower than mouse, but it does work, and often times (in my experience up to and including titan) there is never really any huge concern here. On the flip side, using tab is sometimes faster than mouse if they are all crowded on top of each other ^^;

So, I still do not see what people are concerned about.... and *I* am a keyboard-only user, right here, right now...