I'm comfortable with multiple POV's. The problem is, Game of Thrones is 50 minutes long, and it has been doing this since season 1. And now, almost every point of view has almost converged(I hope you've watched the latest episode in season 7). And, live-reactions are one thing, they actually react to stuff, and that takes time, plus, they don't just read it. In some cases, they actually interpret and explain what happens. Normally(or at least for me), a manga chapter takes 4 min to read, tops. And, it's usually 20 pages long. It's difficult for me to imagine how Oda is going to balance everything. I mean, Naruto did that in Naruto Shippuden, with alternating arcs focusing on Naruto and Sasuke pretty successfully, so, I guess it can be done. But, the point here is it was singularly(or at least mostly) focused on one of these two characters. In Sasuke's arcs, Naruto plays a small role, and in Naruto-centric arcs, Sasuke doesn't make an appearance at all. The one example I can think of in which he balanced both of them was during the Fourth Great Shinobi War, when he switched between Naruto fighting with the armies, and Sasuke and Itachi fighting against Kabuto, and again, when Naruto was fighting the war, and Sasuke was talking to the Hokage, though in the latter instance, it was still mostly focused on Sasuke.
I'd be happy if both arcs happen at the same time. It'd be something new. And, it can give ammunition to the animators to somehow make the pacing better, because they have more room to add new elements to prolong the run-time, whenever they switch POV.