Diablo 2, or 3, both did not give you 29 'active abilities'. Diablo 2 was a mix of active and passives. Everyone had at 'least' 1 passive and total of 30 'skills' (skill = being an active, aura (sustained) or passive). Meaning no character had exactly '30' active abilities which is what people are bitching about when they say there are only '29 abilities' at most on a single class. That's just the 'active', the passives nearly double that total.
As for Diablo 3, a WD has 23 active abilities which is very similar to to the total amount of skills you'd have access to as a mage with a specialization. Ultimately, the number of skills isn't what makes it a hack n slash or not. Diablo 2 and 3 are spam fests. You get the few skills that work for you and spam them like a crazy spaz till everything dies. You do NOT do that in Dragon Age, doing so means your out of resources and dead.
If the ONLY thing you 'cared' about was the number of total skills? Then it's relatively similar to past games. Unless you don't count passives in which case I consider you crazy. Passives are skills too, stop being skill-racist (this is a joke, but srsly folks passives count too, stop acting like they don't).
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Example of counting passives so we're not acting like blind chipmunks - Warrior would have a total of 61 'skills' if we count all specializations if they're the same as what we saw with Reaver (which is entirely possible to not be the case). Bwah? 61? Boy that sure looks a lot larger then 29. That's not counting upgrades either, which would bring it up closer to 84-ish.
But hey, more tactical depth to the skills don't matter, lets ignore over half the **** and just ****** about a smaller number being the end all of everything. Skys falling and all that nonsense.
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Dragon Age Origins, the best of all things and all that had a total of 244 'things' (passives, actives, sustained) that is including all specializations and bonus class bar from Awakening 'expansion' (not the base game). The expansion I may point out added 36 of those but folks like pretending its all 1 thing that came out at once so... 244, from the start! Oh, forgot the blood DLC skills, that was 2 per class so... 250!
At 84 each in DAI it's 252 and this is not counting perks and bonuses you'll gain from are war table perk stuffs. Or whatever that ends up being, looks like mostly xp bonuses and chat options. This is a tad less then DA2 though, as DA2 had 270 total (10 per web, 9 tabs per class) DA2 did a pretty good job of diversifying things compared to DAO. DAO had A LOT of redundancies, but DA2 didn't do to much to make things more tactical or strategic.
DAI we've already seen far more interesting passives and interesting uses of spells. Fire/Ice wall, a lightning spell that creates a ring of electrical stunning. I get the radial menu not having skill use (radial menu is still there) kinda sucks from the point of view of having extra stuff to use when you need it. But damn people it's not the end of the freakin' world. They've already shown more interesting stuff from a skill perspective then whats been in any of the past games.