The General is not so much overpriced, as not competetively priced compared to the Arch Lector.  I say drop the general by 10 and raise the AL by 10.
The wizard lord is priced just fine, especially with the rod of power and the various bound items in the book.  Again relatively hurt by the Arch Lector.
I think the Runefang is fine.  It should be really expensive, it should be rare.
I think the Hellblaster is fine.  You are just spoiled by the old version, whose potential was vastly too high.  It isn't an area denial weapon anymore, which is good.  But its still scary to face.
Engineers are not worthwhile at any reasonable cost.  Their abilities aren't useful enough.
Halberdiers are not worthwhile at any reasonable cost.  Statistically, double attacks are better than extra strength in most situations.  In the situations when the halberd is better, the odds of doing zero damage are so high it doesn't matter.  GW had to change the unit somehow to create something of a noticable unit difference that might give a reason to take them.