Complex sentence: Gore wasn't sure if it was going to be a big hit, so he was reluctant to recommend this song as the first single, but when he eventually did, it turned out the rest of band, Daniel Miller, and producer Tim Simenon agreed.
Split into simpler sentences: Gore wasn't sure if it was going to be a big hit, and was reluctant to recommend this song as the first single. Gore did eventually recommend the song and it turned out the rest of band, Daniel Miller, and producer Tim Simenon agreed.