Of course I don't take offense.
The edit text button is to prompt people that they can rename the soldier, not to customise appearance. Ideally that button should be in any area that is clickable for an editable name, for instance next to the craft name in the craft screen, or the base name. I definitely think it should remain there in terms of indicating how to use the interface, as I never discovered that you could edit names when I played the original game, back before I even had internet access. Perhaps there should be a picture-based customise button too? If it looks silly we can change the customise button, when it's ready to go in, back to being text-based.
Your other points are well-taken, however. I had considered it seemed natural that changing the picture would leave the screen intact but scroll the soldier being referenced, and I dislike interfaces where scrolling buttons are separated from each other by too much distance, but I could go either way on the matter, especially seeing we should be getting either arrow keys or tab and shift-tab to switch soldiers in the long run anyway. However as the number of characters is going to need to be limited to something small enough to fit the top frame, I definitely think that the scrolling buttons shouldn't be up there.
I really like that you added back in the total column and changed the figure to the right to be the lifetime improvement of a stat. That's pretty awesome. So, all in all, a small counterproposal:
Edit: Ah, sorry, you edited in your explanation for moving the arrows up since I last viewed the thread. I considered putting them directly next to each other as well, but it looks very crowded if we do it the easy way and move everything to the left. What might look good though is playing some small amount of musical chairs with the arrows and the picture, which would give us a nice centralised location for it, instead of slightly offset from the right-hand edge. (and thus v3 becomes v4, lol)