It's the sort of energy and pace I had fifteen years ago when doing fanfiction. It feels vaguely wrong for adults writing 'proper stuff' to be doing it.
From what I've seen (with the caveats of inevitable exceptions and a small sample size) this subgenre doesn't lend itself to long series, whether rushed or not. I liked Team Yankee, but Harold Coyle still came across as something of a one-hit wonder to me, and he's one of the best examples. At the other extreme the Kirovs have long since degenerated into lets plays of different wargame scenarios. In the middle, the central book of Black's "Effect" series was the weakest.