I use an HHKB Pro 2 for coding as well. I was a guy looking for dedicated arrows as well because of how often I use them. I thought I would struggle with the FN arrow keys but I'm actually doing it without thinking now and it's been working out really well. I also love the fact that the modifier buttons are big and easy to hit as well as sparse, so I don't hit a button I didn't mean to hit when touch typing (like the many buttons on my Pure Pro). Also, having CTRL right next to A is amazing. I don't know why I never considered using it there instead of caps lock.