Congrats @KevinC. Glad you got passed that hump, this is my favorite game of 2016!
Here’s my opinion of the DLC (I’m a Warhammer fanboy and I’ve purchased all of it [Edit after seeing Mark_L’s post I realized I lied, I haven’t purchased the blood DLC]):
Race Packs: “Realm of the Wood Elves”, “Call of the Beastmen”, and "Chaos Warriors"
I’ve played quite a bit of Wood Elves, and messed around with the Beastmen. Have not played Chaos.
I would say if you’re interested in the race, and they are in the right price range for your financial situation, these are very solid. The Wood Elves play very differently on both the strategic map and the tactical map. If you like Elves, you’ll probably enjoy this DLC. Beastmen play quite differently from the original four factions (not sure how they compare to Chaos), so as with Wood Elves, a very different experience than you’ll get with the starter factions.
Lord Packs – “King and the Warlord” and "Grim and the Grave"
Lord Packs provide two new Legendary Lords (i.e., rulers), six new units, plus a bunch of “Regiments of Renown” which are basically palette swaps of regular units who start of with xp maxed out and have some special abilities.
The new Legendary Lords are going to be most useful to you if you really like a race and want to replay them but want a different challenge. I can’t speak to the “Grim and Grave” which provides new starting Lords, but use the same original starting positions for the Empire (not sure about the Vampires), but the “King and Warlord” Dwarf and Goblin Legendary Lords new starting positions seem to be quite tough (I’ve only played around with them a bit). They’ve also got special rules and will give you a quite different experience than playing that race with the standard starting position and rulers.
I really like the new units. It’s always fun to have more toys to play with.
The Regiments of Renown, I’m not all that excited about. They feel like a bit of a cheat – you can recruit them instantly once unlocked, regardless of your location, so you get around normal recruiting restrictions – instant high level units. Also I agree with the complaints of those that haven’t purchased them that they can mess up the campaign, since the bad guys get them but unless you’ve paid for the DLC you don’t (fortunately now modded out).
I’d say get these if you like Warhammer, just want to have more stuff to mess around with, and aren’t concerned with the price point. Also “The King and the Warlord” is a particularly good purchase if say you really want to play Dwarves or Orcs again, but want a different experience.