Glasses free 3d was treated as a big deal because it was the initial selling point of the system to differentiate it from the ds in ways beyond mere horse power. This doesn't change the fact it was still ultimately an iteration on the ds and doesn't fit the words radical departure. It's just a more powerful ds with 3d thrown on top. While it added a lot to certain games, it's like saying the game boy advance is a radical departure from the game boy for having bumpers and full color palette.
Wii U was definitely a departure, because it didn't emphasize motion controls like the Wii, but I wouldn't call it a radical one. It just seemed like a regular game system with a tablet that functions as a controller. Wii U was definitely advertised as a departure, but we all know the truth: that it was a half step - not truly a traditional game controller, not a full operational tablet. If it were a fully functional tablet, I'd consider it a radical departure, but it just a controller gimmick thrown on top of a regular controller. It's gotten to the point where many late Wii U games don't use the second screen at all and most Wii U games can still be played with the regular gamepad, signaling the controller as a gimmick and not a game changer.
While the switch is the same controller, in terms of features, Switch has far more going for it to be considered a radical departure.
Where you disagree Wii U was a radical departure or not, Nintendo still holds a pretty good record on departures from their previous systems and this should in no way impact anyone's thoughts on the system's marketability.