Yeah, Show Dany is both jumbled (Barristan showing up here instead of Qarth with his ships) and she's already bought the Unsullied without brutally Friendzoning Jorah. Has Daario been confirmed for this season?
Next season is going to have a number of high points like Joff's wedding, The Battle of the Wall, Littlefinger and Sansa in The Vale, Tywin on the shitter, the Lady Stoneheart reveal.
I think they'll struggle to get more than a season out of 4 and 5 combined. Those books are full of meandering plotlines that could easily be cut down (Tyrion, Dany) and very little incident (the Others are STILL sort of coming to Westeros but not yet) that doesn't propel the story forwards in the same way the first three books do. I think they are necessary for the story but they won't make good TV. Its all basically set up for the finale.
And with even more characters and places to cram in like Dorne, Quentyn, the Sand Snakes, Victarion, Jon Connington, Aegon it could easily become an unwieldy mess. I've a lot of faith in the producers to pull it off though.