I am through part 3 of The Brother's War.
Rereading this has been a fun experience just to see how I misremembered some things, Mishra is a much bigger asshole than I remembered. By the end of part 3 he is a fat fucking dickhead who refused to believe that the Third Path's research was remotely legitimate.
Urza at least considered the idea of Magic before dismissing it because he only heard about it third hand and didn't have the full set of research, if Loran had taken the Third Path's research to Urza he would have been willing to at least try it instead of invading Argoth, also if not for Gix the War would have solved itself because by the end of Part 3..Mishra could barely breathe without hacking up a lung.
Mishra is the Ethan Ralph of Magic the Gathering.