>>21These happen to be the most important keys
requires you to reinvent the entire interface because everything is designed around hjkl
I'm pretty happily using Vim with Colemak, without remapping these keys.
In fact I like the position of hjkl keys on Colemak better because the fact I have to use the index finger in unintuitive way acts as a simple deterrent from actually using these movements. If you use hjkl for moving more than 2 characters horizontally or vertically, there is probably a better way to do it.
And if you honestly use arrow keys with Vim your argument instantly loses any credibility with me.
IHBT