I haven't been a huge fan of Dany's story, but that scene was bad ***. I'm kind of curious what her next conflict will be. GRRM would have her spend 5 years getting the Dothraki horde to the sea and another 5 getting them boats.
I think it's lining up pretty well for her to get her horde to Mereen just in time for Euron Greyjoy to show up with his fleet and ferry the Dothraki and remaining Unsullied over to Westeros at the end of this season. Then next season lines up as a battle for The Seven Kingdoms and an even bigger battle with The Others.