The Falcon Wing doors were designed to make it easier to get into the third row of the Model X and also for putting child seats in the car easier. There is no good reason to have them on the Model Y and I really hope they won't (and we have an X).
Now, suicide doors without a B-pillar, I might be in for that. Although it affects how the front and rear passengers exit (into the same space).
+1 on the more squared rear to optimize interior cargo space