Mezzer
First Post
Judging from everything WotC has ever done, we likely won't ever see modularity defined to the point you seem to want it at. They seem to highly prefer just defining stuff as complete package in which you may get a few basic choices (ie core), and any modularity is then offered in the form of rule variants (via accessories basically).That's what I want to see in the next packet, some defined modularity.
Making say class mechanics inherently modular, beyond what you see in the playtests now (an example would be a wizard that gets to pick just how his spellcasting works), is highly unlikely I would say.