Complex sentence: Maurice felt the group would be better as a quintet to channel "The Jackson 5" and Brook suggested his nephew Ronnie DeVoe may be able to join, but must earn his spot to be in the group.
Split into simpler sentences: Maurice felt the group would be better as a quintet instead to channel "The Jackson 5". Brooke suggested that his nephew Ronnie DeVoe may be able to join, but must earn his spot to be in the group.