I actually prefer it simple like this. I'm not saying I never appreciate structure - back pockets, or middle-pockets like Montaigne or Lockme are awesome and I use them, but I wouldn't want a bag like you have in the picture.
First off it would be very specific - I find that a lot of bags like that have some tiny pockets (presumably for people who carry lipsticks and stuff?) but I don't want or need those. And for example the bottle holder there seems nice in theory, but would most likely make the bag look a bit uneven depending on how full it is.
Overall I like the flexibility of minimalism, and IF I wanted a bag organizer, they're so cheap and customizable that I don't see the problem. I COULD, however, 100% get behind LV themselves selling the inserts. Just not stuck to the bag please!