So the main reason I think that TBB will have a reasonably happy ending is multifaceted but I think the biggest one is that a lot of the series it's compared to have entirely different focuses but only one requires minimum the majority of the characters to be alive.

It comes down to the central question of the work. Let's look at TCW - this one is super broad because it's essentially an anthology rather than an overarching narrative. It's literally just "what happens between attack of the clones and revenge of the sith." The only thing needed to bring it to a satisfactory close is to go up to the end of the clone wars and segue into ROTS. Which, as a tragic film, does necessitate a bit of a downer ending. But, the ending feels fulfilling even with the tragedy because it satisfies the central question.

Rogue One is much more narrow, how did the rebellion get the death star plans? The reason you can do a total cast annihilation in this one is because the central question isn't character focused at all, it's mission focused. As long as they move the mission forward, the characters dying doesn't make the ending less satisfying. The central question is answered.

So what's been TBB's central question? It hasn't been mission focused, it's not "how do we fight the Empire" and its not as broad as TCW's filling in a multi year gap between movies. It's asking "who are these clones if they're not soldiers" it's asking "how do you heal this family that's been broken by tragedy."

And killing off most of the main cast answers these questions as "nothing" and "You don't." It's like answering "what happened between these two movies" with 'nothing' or 'how did they get the death star plans with 'they didn't.' It negates the central question that we're introduced to, it would render the entire endeavor pointless. Why would we need three seasons to get Omega from 'alone' to 'still alone' why would we build up the desire for the family to heal just to say they never will? Why would we watch them go from broken to more broken to absolutely shattered in a trauma mill? It doesn't answer anything, it just trails off.

I don't even think that the question of how to heal the family can be satisfied if Tech is actually dead. MAYBE if we had more time we could soothe away the trauma of that and still resolve everything. Maybe if his loss was the only one that needed to be wrapped up and processed we could resolve that in the time we have left.

But needing to bring Crosshair home, bring Omega home, AND heal everyone from Tech's death in fifteen episodes that also require enough action to keep ten year old boys interested? Yeah, I don't think that's happening. I think the only way that this gets wrapped up in a way that actually holds to the themes of the show is an ending that has the family together, an ending that actually answers the questions we started with, one that said *they're not soldiers, they're family* and that the family is in fact capable of being healed.