Lots of comments - excellent! Let me take the time to address them:
@Lord Solar Plexus: Pretty much what you said. If you're already taking Shadow or Death, you might be able to throw a Mortar or two in there and get some good juice out of it, especially if someone shows up with T3 blocks that have a 5+ save or less.
@Lanceocletian: I don't feel that a move to Yellow is warranted for Greatswords and Swordsmen - Swordsmen are the only State Trooper with a parry save and WS4 does a lot to reduce incoming hits against certain stripes of foes, and Greatswords' 4+ save is present and accounted for against anything lower than S6, and even then Stubborn and swinging at S5 is something we can't really get out of other infantry. Are they perfectly priced? No, they really should have been 1ppm lower. But they don't suck.
@Slavik: I'm going to have to disagree on that - if you have a War Altar or a list that doesn't fancy being in close combat, the Priests are far from a necessity.
@Krokz: Pistoliers are overpriced, in my opinion. 18ppm is too much for T3 models with a 5+ save that are incompetent in close combat and only have BS3 (given that Pistols only have a 12", that typically means -1 from double-tap, -1 from long range/stand-and-shoot = hitting on 6s). If they were BS4, I would be more into them.
Halberdiers should not be Purple, and the reason why is that people have reported success with all-mounted Core.
I would also agree that a Volley Gun is probably Green without an Engineer, but this Handbook rates the best-case scenario - barring extremely low-points games, I wouldn't field one without an Engineer, and so the point is moot.
Bernhardt already noted the reason why Huntsmen shouldn't be Red, so I don't feel the need to elaborate.
@zifnab0: Going to have to strongly disagree with the assertions regarding the General v. Grand Master. While the Grand Master is limited in his focus (which is something I already noted), he provides a buff that is far superior to Hold the Line! in Immune to Psychology - it's also more generally applicable (how many times do you take Fear, Panic, or Terror tests? Probably more times than you do Break tests). Moreover, you can get Hold the Line! from a Captain being in the unit - the Grand Master is the only source of unit-wide Immune to Psychology.
As for the point regarding Knights whiffing... that's what a Warrior Priest is for, no?