I think they bascially cribbed every good gun design idea form the last 15 or so years and crammed it into one gun.
I don't think it necessarily made a better gun. All the modularity may be great form a manufacturing perspective, especially since all the metla bits are probably stamped or MIM, everything is really cheap, and you cna stockpile everything that isn't serialized.
However, I doubt many organizations want to manage the inventory for all the unserialized options. That will be managed in the distribution channel. That's just going to be a mess. You think the M&P has a lot of skus, wait till this sucker shows up.