Complex sentence: He was widely considered the best of the Neosapien Generals, although he always lacked spontaneity and unpredictability in battle which may be why he (despite false accusations) never betrayed "Phaeton".
Split into simpler sentences: He was widely considered the best of the Neosapien Generals. On the other hand, he always lacked spontaneity and unpredictability in battle which may be why he (despite false accusations) never betrayed "Phaeton".