I'm not sure if my comment is of interest to anyone, as the campaign seems to be a discontinued project.
Anyway, I have mixed feelings about The Black Company. From the point of view of design and creation, the campaign is superb. You really have to challenge yourself to get through some missions. The units are varied and interesting, I like the concept of fighters having critical strike, for example - this way the basic unit does not become obsolete, like in many games. It appears that the campaign was really thought through and a lot of work was put in it.
However, despite the strong points, I must admit that the campaign is a disappointment. I got to mission eleven and I'm not sure if I will continue. The difficulty level is killing me. I wonder if the campaign makers actually played the whole thing a couple of times just to test it. Mission eleven and the one before it (when you have to rescue 6 camps from the rebels) seem completely out of this world. In mission eleven, each elf attack leaves my army decimated and half of my guard towers destroyed, and it takes only a couple of minutes for the AI to muster a whole new raiding party and make matters worse. Before I even managed to get to the elf base I was overrun by an assault wave leaving it. It's ridiculous, with the elven warriors having superior spellcaster, unlimited resources, etc... The heroes are weak to the point of being more fragile than some infantry units. It's especially evident when you fight against rebel armies whose troops have over 1000hp on average and loads of armor (and much more powerful attack!), while your units have around 700-800 hundred, standard armor and standard attack rate. This is not supposed to be this way! Difficulty should not lie in the lack of equality between races. In the original Blizzard campaigns you managed to boost your heroes and gather some items by the 6th or 7th map. Here, you have nothing or almost nothing at all and to make it worse, you get a different hero with each map. It makes it all the more confusing as you can't get used to playing any character, really.
The cinematics are way too long, as a number of reviewers have pointed out. I stopped watching them after the first map. It is really easy to implement the 'esc' option in Warcraft editor to skip cinematics, I'm not sure why the author hasn't done that.
Overall, the campaign remains a solid effort, I really appreciate all the work done, but I'm afraid the it needs serious improvement to become an enjoyable experience and not an insurmountable challenge which ends up with the player resorting to cheats. I think not enough testing has been done here...