There seems to be a broad range of experiences with the latest change as illustrated by the quotes above as the latest examples. What I gather from all those responses is that people who had no issues before now have a screen that is not sensitive enough and people who actually had problems are happy about the change.
For me this looks like a significant variation in the hardware (quality?) of the devices. If this is indeed true, then no static change to the way touch is handled will not work for everybody and a more fine-tuned solution would be required.
Personally, I had no touch issues so far and also did not receive the update, yet. My device also does not seem to suffer from the dimming issue, further illustrating the point that there seem to be very different qualities around.