>>12032229
The main reason they have diagonal placement is to find the most ergonomic compromise between directional inputs like shown here
>>12022275
This device's screen is 7" in length enabling more ergonomic placement of controls. But the swappable nature of the other design is to "min-max" the ergos on ether directional input. In most games, the other directional input is usually used in a menu or as hotkeys. This design is focusing the ergonomics for their primary use, while respecting the original design's size.