[Update #2]: Fatshark has now added a magic-focused career for Kerillian - Sister of the Thorn!
[Update]: Vermintide 2 update has greatly improved bot AI behavior and survivability.
Vermintide 2's first post-launch career was the Grail Knight, a purely melee focused juggernaut that could stand up to an entire horde of Chaos Warriors. The newly added Outcast Engineer, however, is the exact opposite of that.
With almost no defensive abilities and a low amount of health, the Outcast Engineer is a pure glass cannon, with the emphasis on cannon! Instead of having a standard ultimate ability like all of the other careers, the Outcast Engineer can whip out a gigantic minigun at any time and carve a path through literally anything. Best of all, the minigun is steam powered and doesn't use ammunition, so if you're particularly careful about managing your steam pressure, you can have that bad boy sing throughout every single major encounter!
Besides the minigun, the Outcast Engineer also brings with it the Masterwork Pistol and Cog Hammer weapons. The Masterwork Pistol dishes out an obscene amount of damage with each hit, though it does require both precise aim and a bit of tracking as the projectile takes a good second to finally leave the barrel. As for the Cog Hammer, it essentially serves as a side-grade to the two-handed hammer, and much like its larger cousin, it's a highly useful weapon for when you need to push an entire mountain of rats away from your incredibly squishy frame.
After playing with all of this for a few days now, I can safely say that the Outcast Engineer is by far my favorite range-focused career in all of Vermintide. It's quite tricky to play given that you're as fragile as glass, but there are few things better than mowing down an entire horde of rats within the span of a few seconds. Just make sure you don't accidentally gun down your allies, because as it turns out, a hailstorm of bullets hurts regardless of your allegiance!
As for the price, the Outcast Engineer DLC has once again been separated into two. The career itself costs 3.5€, while the bundle containing the class and challenges to unlock various cosmetics will set you back 8.79€. While there has been a bit of hubbub about the whole separation among the community, I'm firmly in favor of this approach as getting the Outcast Engineer and Grail Knight on the cheap is far more enticing than a couple of cosmetics hats I can't even see while playing.
Whatever your thoughts on the matter may be, you can learn more about the Outcast Engineer over at Steam. Have fun, and I'll leave you with the brief trailer: