Not exactly sure what you mean, Scribs...
Do you mean that you hope there's not just a single "module" all told that gets layered on top of the base game (that might transform it into '2E-like' or '4E-like')? But rather that there are many modules, and thus you can take one module here and another module there and create whatever type of game you want?
Or do you mean that you hope that any particular "module" as it were, is also broken down into several even smaller components that can and can't be added to create this "module"? So in other words... if there's a "tactical miniature grid combat" module, that within that there are several different components that you could and did not have to use? So "difficult terrain" was a module component you could choose to use or not... that 1-1-1 diagonal movement was a component you could choose, or 1-2-1 movement was another one instead... that Auras as a concept could be used or not used, etc. etc.? Getting really nitpicky with individual component parts?