Well WoR might have as well been a separate game. It pretty much was open world do-whatever-the-heck-you-want set in the FF6 universe.
Was groundbreaking and unheard of for such a storied (HEHEHEH) franchise, but I can understand why people who like FF for the narrative might feel like the pacing went out the window.
Well, some of the most important stuff in the plot happens during that section, so I enjoyed it the first time. I just find it tedious for replays, even though I pretty much know exactly where I have to go.
I preferred the non-linear structure earlier in the game, where you have to choose between the 3 separate parties and their vignettes. That might actually be my favorite part of the whole game.