/%<CR>qqnxq19@q is clearly the solution to the "navigate to % and delete it"

Or f%x

That doesn't finish the challenge

It does, actually. But you have to precede the command with <num>G to go to the correct line.

The correct answer!

When you consider the concept of home row keys and touch typing I find it very natural, actually. Its ergonomic and very fast if you get into the habit of resting your fingers on the home row.

Though you may have been alluding to more powerful movements!