All you say can be done. But i think , seing your layout, some part are not "straight" foward in Atomic because not documented or require a custom plugins. (as display the detailed information of the game).
And by default swith layout from vertical to horizontal with one key is not managed. In Atomic , you have to do a menu to choose "vertical" or "Horizontal" , and according to your choice you enter in a screen that is oriented as you want. (Atomic has also an autorotate feature , but it is the same layout that is rotated).
Otherwise you can do what you want, but will require to make a plugins that in fact manage almost entirely your layout.
Honestly, if the only feature that is missing for you , it 's just the SNAP/TITLE blink. I guess you could ask loadman to implement it in the next release. It is not something difficult to do. Could be done in a couple of hours , i guess.