The Battle Hosts are a great idea, but missed the mark a bit on execution. Among other things they could really help solidify an army that is not as strong in the core rules, helping to boost the usability of some underplayed forces.
HRM wrote:
As a Rohan player, I found the "Riders of the Westfold" Battlehost pretty good. "Emoer's Knights?" Unless you're popping 300 pts for Gandy, not so much.
I think the Riders of the Westfold is a very good example of a BH done right. It is themed, has a reasonable cost, requires a fair number of Formations (rewards collectors), and is not over powerful. The other BH I'm very familiar with is Thranduil's. Again, reasonable in cost, required models and bonuses that are themed and not over powered. And both provide a little boost in usability and competitiveness to an army that is ok but could use just a "more". In my opinion, the majority of BHs fall into this category.
There are some however on each end of the spectrum. Look at the Ent Battle Host for example. It's expensive, 75 points if I remember, and requires you to have Treebeard and at least 3 Ents, which is a big investment in real money and points. And what do you get for it? A minor bonus when fighting a single faction (Isengard) and one generalized (but not worth the cost) bonus. A better designed BH could have made Ent armies an attractive option to play by giving more generalized bonuses. Now look at some of the Evil BHs. Morgul Knights has the same points (IIRC) and gives WAY better bonuses that can be used in nearly any game. And the Flying Nazgul BH (can't remember the name) turns any of your Nazgul within range of the WK into VH2K models. I'd pay 75 points in a heartbeat to allow any Ents within range of Treebeard to be VH2K.
The presence of a few "must have" BHs (the only ones coming to mind are Evil, but I'm sure there are some over powered Good BHs as well) and a few "why the heck would I waste points on that" really makes the BH supplement look like it was put together by too many people that weren't talking well with each other and had very poor guidelines to go by on costing. A better review and simple point adjustment would clean up a lot of issues with the current BHs (don't alter the BHs, just make the points reflect on-the-table value) and then they can publish a few new BHs to fill in some gaps on under utilized armies. A quick point Errata for BH would help dramatically and cost GW nothing more than a day's work by the team and some bandwidth to publish a PDF.