Then it would be a problem to me. The 4Kids dub of Sinnoh would have been their worst arc yet. They would have gone far as to replace ALL of the music than most. I think music is an important part in Pokemon. The 4Kids tracks by themselves aren't too bad. They are very melodic and catchy in a way. It's just that it will lose alot of musical variety. One of my biggest problems with the later seasons in 4Kids (starting with Johto League Champions) is that they used more of their own music and less of the original music. Yes, they didn't use alot of the original music in the first episodes, but those were kinda like experiments and at least they used more of the original BGM as the 1st season went on. This is a guilty pleasure, but despite my preference being to keep all of the original BGM, if they want to use their own bgm, I rather use all of the Japanese BGM while filling in with their own music (while keeping at least some moments of silence). But still, replacing music is unacceptable to me and I would rather keep things the way they are.