I can only critique what I see as well.
As for your pieces being short and linear, it all depends on how you're writing these. For me, the best end is when there's no more to write regarding a specific event without adding too much. I'll link to one of my own examples.
http://forums.minegarde.com/topic/5257-the-old-kingdom/
In terms of brutal or fast paced, here's an old one I had (this version is no longer supported as I have a newer revision of it):
[spoiler]“We, the World Order Army, have agreed to the duel. Our best fighter, Julius Belleiot, will be dueling Engrid Lebolas of the Marvento Kingdom!â€
Many men roared and shouted upon hearing their hero’s name. Each wanting to win so badly, tasting the victory of battle based on just the duel.
A single soldier approached the center from the defending forces and removed his cloak. He had a claymore that was slightly larger than his self, but he was able to wield it fairly with both hands on the hilt. The two duelists were of similar stature and Dylan couldn’t help but think that all duelists were large men that only seemed to intimidate rather than being good fighters until he saw the enemy make the first move.
The messenger had already fled from the center to leave the duelists by themselves. Everyone stood by in silence as they watched the death match. Engrid was running headfirst towards Julius, swinging his claymore from the side, knocking away Julius’ shield arm, an opening for another blow, and then a smash from above after the first swing. Julius rolled to the side from the swing and regained his posture and ran his shield into his foe to knock him off guard. His mace seemed to carry a large force as he swung it from the side and impacted Engrid’s plate mail and Dylan could see the enemy’s armor shatter from beneath the raw power. Engrid tripped Julius as he fell with a swiping kick and got his target to flinch before he swung the claymore from that bad position and struck Julius on the side of his knee.
Julius lowered his guard as Engrid regained his posture and pushed him back to deal another heavy blow. Julius charged into his foe, a pretty unethical move, and knocked them both into the floor. This time however, Julius regained his footing first and smashed the mace into Engrid’s chest once more, his foe coughing blood from the impact.
Soldiers from the Order erupted into cheers while insulting Engrid’s failure in front of the Marvento forces. Engrid could no longer move after that second blow and could only stare at Julius’ silhouette as he landed another blow into the face, disfiguring it, spewing blood across the white-layered ground. Dylan stared in disgust as Julius landed the final blow, shattering the enemy hero’s skull. [/spoiler]