Funny thought: With her latest arc Dany has come full circle, rendering everything she's done since season one essentially moot.
Let's think it through:
Season 1: she is married off to Khal Drogo in exchange for an army. She has a mighty Khalasar and her husband the Khal pledges to take her Khalasar west to reclaim her throne. Khal Drogo dies. The Khalasar all fuck off. However, dragons hatch.
Seasons 2-5: Dany goes through various states in Essos. Gaining an army, losing, regaining, then eventually locking up her dragons, while the biggest meanest one flies off. She is then "Rescued" from the fighting pits, by aforementioned big mean dragon who then drops her right in the middle of a new, different Khalasar.
Season 6: she sets the Khals on fire and takes their Khalasar, and pledges to use her new Khalasar to retake the Iron Throne.
Putting her right back in the same place she was at the end of season 1. Headed to Westeroes at the head of a slightly larger army than she had before, to attempt to take the throne.
So what was the fucking point of 95% of her plot line is Essos? What did ANYTHING that happened in Slaver's bay after her recruiting the Unsullied have to do with anything? All it proved was that she really doesn't know how to manage a kingdom and that frankly if she DOES win in the end, Westeroes is just as fucked as Essos is now.