Man does the Astartes series get me seriously jazzed up. It has that nice frenetic feeling when it comes to how it does its effects but keeps the physical movement of the astartes and voidsmen dynamic. I'm not a film critic, I don't have time and I frankly don't care, neither am I gonna pretend to have a studied eye for a lot of details: but this is the first time I can remember where the fluidity of motion didn't throw me given the art style. It kinda bridges the uncanny valley effect in physical movement for the rigging (for me anyway) that a lot of other productions just never got with either block or jelly character physics.
Long story short: this felt good. Helsreach is a good story, it made do with what it had for tech barriers in the past decade-ish that it was worked on. But, Astartes feels right while I had to 'get over' Helsreach's limitations for the gem and effort that went into it. Call it psuedo-Stockholmed if you will.
As for the heavy weapon thing, the variety is killer, the little plasma effect was nice when it cut through the smoke (and the little screen blank in the targeter was terrific), and yeah, twin-linked multilaser carriage gets a marine and it looks like the armour is peeling. So he 'Nopes' it out of there straight back to cover with a smoke grenade casually tossed in with that mechanical efficiency.