C++ is planning to outsource that to the Unicode standard, because they're maintaining a stable list, and really that list doesn't get new items at any regularity. The big change was not white-listing all the unassigned characters, since that allowed all sorts of problems, in addition to allowing the RTL stuff. 

There were some grammar changes just to fix some problems with pp-tokens, making sure that UCNs always were, and dealing with pp-numbers that don't turn out to be numbers. 

The most controversial change is this cleans out the emoji that have crept in, and it's mostly controversial because people think they are all allowed, whereas there are swaths of them blocked out now, including some of the ones used as modifiers.