The last 12 minutes I wanted to give this a higher rating because of the last 12 minutes or so, which was the best part of the episode. Oliver and Felicity's ending was emotional, even if it felt a little weird that she left her kids to go be with Oliver, knowing she could not return.
Anyway, we can't discount what came before the final 12 minutes, and what came before was average. The fight sequences, although short, were pretty solid. I just didn't care much for the flashforward to the future scenes, which has been the case far too often this season. And Emiko was a weak main villain.
So for me, no higher than a 6 or 7/10. Still, probably better than the Game of Thrones finale will be.