That sound is part of their identity. I don't think I'll stan them for long after a sound change if they do so.
Yeah, although 2019 was a great year for them in terms of them getting more recognition, it was also the first time where I didn't enjoy their music as much as I had done, although I still love them and they are still my favourite kpop group and will always love the opportunity to see them perform live, but it seemed like their rock sound toned down a bit, so I hope they can go back to being heavier.
I believe they'll stick with rock bops, but they may experiment a bit with it if they want to reach out to the GP more. However, it seems they enjoy are are happy with the momentum of each release. They gain more and more credit and fans each comeback. They could very well catch their big break this year and do VERY well.
True, I just hope it doesn't change too much that it's too far away from their original sound.
I hope they can get their first win this year though, it would be amazing if they can.