Complex sentence: Tommy Jacobsen & Lukasz Kowalski left midway through 2014 & were replaced in early 2015 by Javi Rute Rodriguez & Donna Grimshaw & plans were underway to rehearse for the remaining shows of that year.
Split into simpler sentences: Tommy Jacobsen & Lukasz Kowalski left midway through 2014 & were replaced in early 2015 by Javi Rute Rodriguez & Donna Grimshaw. Plans were underway to rehearse for the remaining shows of that year.