Earlier quoted context omitted.
This is actually a necessary feature for a touchscreen keyboard to feel usable, and it's been in iOS since day one. The problem is that it has gotten not only much worse over time at predicting which tap zones to enlarge, but it also feels more aggressive. For example, tapping the shift button on the iOS keyboard enlarges the Enter/Return key's touch area so much that I am unable to immediately tap the microphone ico…
I disagree that it's necessary and I wish I could disable it. They even have it enabled on iPads, which are a tad larger than the original iPhone, and which can be used with the official stylus.
Agree at this point that I would disable it (in its current state) if I could, but when it worked correctly it was a huge boon to typing.