Is it uninteresting or blander than the other novels on the sight, or.. what do you mean by bland, more specifically?
I mean it as in a way that I can envision your story taking place in any setting.You have the normal call-signs and ranks for characters (i.e: Commanders and Privates), the usual descriptions for spaceships you'd see in common sci-fi, space themed stories and the names you used for the platoons along with the usage of Roman Numerals. It's probably just a personal nitpick but, at one point in your Teaser, I envisioned Vivienne as Captain Kirk.
What I meant is that it's very common among other sci-fi -in-space stories out there in the market, with very little to set them apart. But since this Teaser is all we got for now, I assume there's gonna be more. If you're aiming for your story to be lore-oriented, then I don't think it'd fare so well. But if it's story-oriented, I'd be very interested as in how you're gonna follow it up because-
-it might be a personal nitpick but I felt like you wrote yourself into a dead-end. At least from one perspective. Vivienne is a no-nonsense, tough, hard-as-nails commander who takes no shit. Jean is an enthusiastic platoon who's new to the scene and is willing to see Vivienne's streak for what it is. Storm is a sort-of veteran who sees things between the lines and depending on how the rest of the story goes, is either an asshole nor a hardened, realistic military man. From the get-go, your characters fell into archetypes. The tough chick, the scared but enthusiastic Private Ryan, the battle-scarred Vin Diesel. Not accounting to the other characters, I could see the tough chick slowly opening up to her team, Private Ryan learning the truth about battles and accepting that there's more beyond, and Vin Diesel either spiraling into his own realistic view of the world in a negative arc or opening up to his touch chick commander.
And, as
@Ral said, your story starts off with a half-way expedition. They should be relayed with enough information before take-off, not asking things right now. If anything, if you want an introduction, Vivienne can read off an agenda on a mission statement or hearing the platoons having deep discussions towards possible scenarios, like, depending what kind of a mission they're going, what kind of weapons they're gonna use against the Margentians or their preparation to bring human luxury towards an unknown planet. They could probably swap rumors on how shitty this mission is gonna be or how they're all sent to hell anyway.
As of now, the Teaser remains as what it is, a Teaser. But it's not so much a tease as it is a prologue, TBH.