The ratio of times I need to cancel the correction may be something like 1 in every 100-200 corrections. I think it's a fair trade. I'll only look up if I'm typing some oddball word that might mess up. I've never had it screw up while typing "for" but I can't recall what typo if any I may have made on it.

Is there some room for improvement? Yes, Andy's suggestion of learning would be amazing. However, reversing the way it works now would absolutely kill the feature. I'm sure that after using it even those suggesting it wouldn't like it.

And there's no comparison to the rotation lock thing. Besides, isn't there a preference somewhere to turn off autocorrection?