Loras is lord to Highgarden, not Riverrun. Edmure is now lord to Riverrun. And Renly, not Stannis.
A big problem here is that this is just another case of the tv show deviating from the book but it has a lot of reason to do so. In the book, Loras has two older brothers. Loras is the youngest, and likely has no claim to any lands nor titles. Willas, the oldest Tyrell son, is crippled like Bran. The man cannot walk. He is the one promised to Sansa, and he lives in Highgarden. Sansa sees it as a good thing because it's potential to get away from the Lannisters and the King's Landing. Thus continuing the tradition of Sansa being matched up with monsters and people with physical ailments (Joffrey, monster; The Hound, physically burned; Willas, crippled; Tyrion, dwarf). In the book, Willas is heir to Highgarden, the second brother is also already married. Since Loras is the youngest without lands and titles, and the man he loved is DEAD, he becomes Kingsguard. In the show, it is unlikely for Loras to become Kingsguard, especially after last week, since he is the heir to Highgarden, and they have no other sons.
It's a complication created by the simple fact that Willas and the other Tyrell brother never appear on screen, and tv viewers have as much ADD and small attention span as it is with the current characters, fuck bringing up characters they can't even SEE and who may not show up anyways.
Anyways, I dislike how they continue to play up Loras' homosexuality, as if for laughs. Loras Tyrell is supposed to be a gallant young knight, equal in swordsmanship only to Jaime Lannister. With Jaime's hand gone, Loras is now THE knight in the Seven Kingdoms in terms of gallantry, jousting, and swordsmanship. And yet they playing at LOL cigarillo shit because homoerotic storylines are so funny!