In a BTA tier it would be great. Like this there's a lot of filler for sure.

I have most of the expansions (except the newest one I think), I want to say pool is worth it for sure, but I usually disable Harbinger and blood moon as they change the game a lot (which... you may enjoy)

I was going to do that actually, I didn't even know they DIDN'T offer the credit until I saw your post. Damn, it's weird that they didn't this time.

It's objectively worse since I subjectively don't like it, I can confirm.

Yeah, they started releasing bundles with 1 game as the selling point. T3 and the rest is filler.

Talisman: The Horus Heresy instead of Talisman would have made the theme of the bundle a really complete Warhammer one ;)

yes, the horde mode you can theoretically play solo, but in reality you cannot ;p it does not scale, so if you play solo without co-op you will face against enemies designated for full co-op party. It is possible to finish 1st level solo but anything above that will require playing with other people. Skins can be used in multiplayer only, as singleplayer is linear story about specific marine from specific order and having other skin would make no sense story-wise ;p

Warhammer 40,000: Dawn of War is amazing, I'll tell you that. The rest are "meh" for me. I would like Battlefleet Gothic: Armada, but it's too expensive for me.

Dawn of War 1 is excellent game, but it's a little old so graphics are dated, if you require high quality graphics it may be a problem ;p
Talisman is basically a 1:1 copy of board game, only sense it makes is to play online with other users and that's only if you like old classical oldschool board games.
Vermintide is highly praised co-op game - if you like the genre it's one of the best titles you can get.
Space Marine is very linear action-game, if you're a fan of WH40k universe it's worth a try, I enjoyed it, but if you're not a fan there are dozens of better games.
Blood Bowl 2 could be a good game if not the way they decided to monetize it. It's a turn based strategy based on tabletop game but not a 1:1 conversion, problem with it is it's monetization, base game offers very limited number of races and vast majority opf races are sold as separate DLCs, in comparison to Blood Bowl 1 it offers much less and requires you to buy additional content.
Dawn of War III is shite - it's unfinished game they were supposed to develop further past-launch but they dropped it due to poor sales. You're much better picking up previous DoW games.
Gothic Armada looks great, but is reported to be full of bugs, unstable and unbalanced, plus it got dropped without promised fixes by developers who instead started working on sequel. I'd still love to try it out, it looks gorgeous and gets a vibe of big scale battles from the universum, but I wouldn't say T3 price is worth it.

Tier 2 should give you good games but Tier 3 is not worth it.

That is kind of weird. Include 1 and 3, but not 2.