Where do you see that? The photos look like the same rubbery things they are using in V1?
If you currently have one, are happy with your setup and don't really use the f keys it might not make as much sense to do an upgrade. If you need another unit, have killed your current unit, or want to make the switch I would recommend this over the previous models.
The stuck modifier key issue I didn't know was universal, but is annoying. I'm surprised they can't do a firmware update for that? Does it really need a new model to fix it after all these years? I've had the stuck modifier issue from an advantage from 2008.