Some comments on these:
1) Foreign tourists make up less than 10% of Orlando visitors, I was surprised it was that little. (We had some good data on our stock thread on that but of course I can't find it now.) That means that even if it dropped by a third, it would just amount to a couple percent less in overall visitors.
2) Your comparison is nothing like EU/WDW - EU will draw more overall visitors to Orlando and many of them will find their way to WDW, it is exactly what happened when HP opened, both Universal and WDW attendance went up.
3) This is certainly true and it's frustratingly happening everywhere. I dread calling or chatting with help desks, and the supposed AI improvements do nothing but make it more frustrating!