I also think that Jazz should stay dead. Aside from giving other characters a shot, I also think that bringing him back would make his heroic sacrifice in the 1st movie less meaningful and it also makes war seem inconsequential and lessens its tragic nature - thus basically trivialising death in battle. Yes, it totally sucks how war creates death - there is nothing nice about war! Having characters die and stay dead helps reinforce that sad and very consequential reality of war.

Jazz is the metaphor for the fallen soldier who is remembered by others as a hero as making the ultimate sacrifice in the defence of freedom and justice.

Heroic Autobot