For most people the south keys and center are easier to press and more importantly hold. I don't care much about directions anymore, except for holding down keys.
Layout is a personal thing, we use Vial, so different people have different layouts, mine has a ton of mnemonics in it. It's really up to the user what they want, I'd be surprised if there are 2 Svalboards with the same layout. (Maybe stock when they are starting out, but people develop their own opinions pretty quickly.)
For most people the south keys and center are easier to press and more importantly hold. I don't care much about directions anymore, except for holding down keys.
Layout is a personal thing, we use Vial, so different people have different layouts, mine has a ton of mnemonics in it. It's really up to the user what they want, I'd be surprised if there are 2 Svalboards with the same layout. (Maybe stock when they are starting out, but people develop their own opinions pretty quickly.)