This is true. The new Fkeys are not grouped.
> The arrow keys are proper sized buttons (even the macbook has it wrong).
This is false, look at the linked image[1] and tell me that the arrow keys are different on the new keyboard.
> There is a slight curvature on each key's surface that makes it easy for the finger to feel the borders.
This is also false. The chicklet keys are slightly concave and the island layout makes it extremely easy to feel the borders of each key.
> All of these are missing in the new keyboards.
Again, this is false.
> This chiclet design is the worst thing to happen for the thinkpads.
This is subjective. I have both keyboards, and I like the new style better. I'm a linux user and I use vim. I've probably pressed the Fkeys 10s of times in the years I've owned either laptop. The entire row could be removed and I probably wouldn't even notice.
It's fine if you don't like the new keyboard, but the reasons you are giving are simply not true.