This is truly our "Door of Dreams". Yume no Tobira was the perfect payoff to all the struggles from the previous episode. I still remember the first time I watched it and got genuine goosebumps. It was such a special experience. As for A-Rise, I honestly don't think they're bad at all. Their music has a catchy pop style that's really easy to enjoy. They only have about two or three songs in total tho, so there's not much to talk about. Still, their performance in this episode was really solid. You should definitely give it a watch, they actually got me hooked. Their music is so damn catchy. But yeah... that's pretty much all I can say about A-Rise. As for the animation, just don't pause mid performances lmao. The animators had to make the dance movements look fluid, so a stretched frame or two was inevitable. There's already a meme about one of A-Rise's stretched frames, but honestly, both performances were executed really well.