Personally I think Iris should have given Felicity a black eye. Felicity interrupts her and Barry's vows to make things about her and Oliver. If that had happened in the real world a bride would have flipped the f*ck out being upstaged on her wedding day.
Glad Felicity didn't do that at the church wedding...they wouldn't have had to worry about evil Nazis...Iris would have killed everyone there.
All that said I was a little annoyed Diggle wasn't at the wedding in part 1 so I loved that he ended up marrying Barry and Iris in the end. I knew they would have invited Diggle!
Yeah Diggle not being at the church in part 1 was odd, then I realized there would be a fight there and Diggle is still walking wounded so he'd be omitted.
Funny thing though is that even if he can't use guns and bows he still has his fists. A fist tremor really doesn't hurt the aim of a punch