Skoll Shorties

I'm not against it but I wouldn't strictly have no Horde characters in the cinematic. Tyrande can have the killing blow (when she does die) but they'll still be Horde involvement regardless.

In Legion the Alliance strictly had several of their characters in the cinematics where a character died. Thrall was in like two of them for Cata and WoD while MoP included everybody from both sides. I think its better to play it safe and include both factions for Azshara.

What? Where?

Old Soldier. They also get two entire extra quest chains in 8.1 with Saurfang and Vol'jin.

I'm guessing the Alliance doesn't count Lost Honor?

Lost Honor had both factions...