I think it's a decent start, but doesn't really do "it" for me. The entire "It's my home," thing is what spun it off for me. We're (Human/Awoken/Exos) brought back from death in order to be killing machines. Our home is/was somewhere else. Now having the tutorial be the battle which makes the city fall, where I watch NPC guardians fall. (Something like what the battle of the Twilight Gap was...), that'd be interesting. And at the end of it, having to evacuate into the city. That could give a sense of urgency.