In any case, I suspect that the crit change will be unpopular for reasons similar to those outlined above (for instance by GM4Him). It will seem "unfair" to lots of people.
Personally, I don't care, because I don't think the crit mechanic in 5e is very engaging in the first place. My preference would be to do away with it altogether. I doubt that would go over very well either. My prediction is that they revert to the old style.