Call of the Scarab now requires that you target the creature to resurrect and there does not seem to be any way to do this.
No, you need to target the player to deal damage to, despite it saying “your opponent”
Still bugged, but not the way you thought 
Confused the hell out of me too at first
Yeah, this change came out of nowhere. Pretty odd.
Maybe they’re laying the groundwork for 4-player EDH 