This is a very entertaining mission. The terrain is beautiful, the use of Tal'darim as protagonists. Obtaining resources for new units. All very well done.
These are what I would suggest. - Your gladiators do not have portraits when selecting them. They keep the portrait of the previous unit. - The beginning cinematic. After Alarak kills the Ascendent. Instead of the gladiators turning around one by one. I would turn all at the same time and put the picture of all the units present (Vanguard, zealot and blodd hunter). Alarak (Lower Left), Zealot (Lower Right), Blood hunter (Upper Left) and Vanguard (Upper Right). I think it would look better. -In the final cinematic. At the time of exploding, I would set the screen blank. As a way of demonstrating the magnitude of the explosion.
Those are my suggestions. But again I say that is a very entertaining mission.