A few months, maybe half a year ago it seemed fairly accepted that Glock was behind in production by several hundred thousand pistols. I have not heard recently if they are still behind and if so how much. Perhaps the reason for changes in parts was to speed up production and any changes in quality are a result of attempting to make more parts faster rather than any cost cutting move. That is, of course, just a rambling guess with no facts to back it up at all.
I never talked to anyone who had to fire their gun who said "I wished I had the smaller gun and fewer rounds with me" Just because you find a hundred people who agree with you on the internet does not mean you're right.