Grafta, you have summed it up very well.
I am riding two decks; 159 Rossi One Magtek and a 160 Lib Tech Lando Phoenix. Both have MT, the Rossi being more aggressive. Same size, but not the same ride at all.
With the Rossi, Camber between the feet, tip and tail rockered, it is the shorter "riding" deck. Is is the more stable deck, (MT hard at work here ) but rides easy and is great on the hard stuff.
The Lando is rockered between the feet, cambered under the feet ( per your diagram) This deck is a little "looser" in feel, still quite stable, but loves a powder day. Nice Float
Both offer something similar, but a little different in the delivery. OP, given the type of riding you have described, you will not go wrong with either choice. If you have the opportunity, demo each profile and see which one feels best.