Complex sentence: By adding more synthesizers and a slightly more commercial aspect to some compositions, the band sounded like a cross between their old selves and the recent new wave groups, and undoubtedly were torn apart again by personal and musical issues.
Split into simpler sentences: By adding more synthesizers and a slightly more commercial aspect to some compositions, the band sounded like a cross between their old selves and the recent new wave groups. Then they were torn apart again by personal and musical issues.