"This world is a game; it doesn't exist." I want to feel that the world does exist, and that I'm just visiting it for a while. Blatantly gamist rules like this really break my s.o.d.
This reminds me of the discussion here about the "succubus charming the king" plot and how the succubus stat block charm power wouldn't support it. Like in that case, the answer is that in 4e, the combat rules and the story have been explicitly pulled apart into separate domains. The succubus' combat charm power has no bearing on what she can do to the king outside of combat.
Minions don't exist outside of combat, and probably not outside of combat with PC's specifically. If there's a swarm of minions in a fight with PC's, and those minions survive (maybe the PCs run) and later go to a tavern where they get into a bar fight (with other NPCs), then at that point,
they aren't minions. They're now just characters in the story.
Put another way, you know the racial percentage breakdown given in the 3.X DMG for a city population? 80% human, 7% elf, etc.? In the orcish wastelands there isn't a "monster category" breakdown of 80% minion, 7% elite, 1% solo.
I will say this: it is kind of cool about 3.x that you
can take the rules system and apply it to world creation and so forth... you can look at a complicated 3.x spell and be inspired to create a plot point that turns on some detail about how the spell works. But on the downside, it can turn into a straightjacket.
In any case, it's apples and oranges... I'm looking forward to trying out the 4e style and see how it works out!