Crit fishing in 5e was already a fool's errand. It wasn't worth the effort even before this change.
vis-à-vis the influx of extra races, all the people who want to play in a setting where Tieflings, Catfolk, Aasimar, all the other planetouced are commonplace and where more standard fantasy tropes are subverted, should just be given a sourcebook for Sigil, and it probably should have happened years ago. The more cosmopolitan attitude, and fantasy tropes that the new D&Der seems to like would fit right in there.
I think Wizards recently released something like a less dysfunctional Sigil setting, as well as announcing that Spelljammers is coming back, no doubt a lot of this playtest will be affected by that.
