The reason is that they are appealing to the mass audience of consoles who are generally prefer action games. Dragon Age Inquisition is an awesome game. There's no doubt on that. But it's actually promoting 3rd person action hack n slash rather than party based tactical combat like DAO or Baldurs Gate.
No point in defending this. The game is made to appeal to console gamers.
So what if it was? And DA2? The point is that it wasn't a necessary restriction for ANY platform.
Exacly because of what he said, its not that the consoles can't do it, they can, but the gameplay style prefered by most on consoles is NOT tactical at all.
On top of that there's a reason RTS genre doesn't work on consoles, period, even the halo atempt on the RTS on console was a massive fail. You need massive precision, you need many keybinds, you need to be upclose with good resolution, and tipically not play relaxed in the living room on the couch with a beer. To some extent, tactical hardcore RPGs are more or less the same, and DA: Origins was like that.
On the consoles DA Origins was, also easier, no friendly fire, no real tac cam, because none of that worked well with the console experience, and that's why you see many people complaining about it, cause they want that style back, at least on the PC.
Again, am I saying that consoles couldn't have ways of having more keyslots? ofc they can, they actually did in the previous games, but what I'm saying is that the direction Bioware took was in a greatly related to all these console factors. Heck I've seen some console players ask for more keys.
What I'm sad about is, Bioware didn't stick to their anouncement that this game would play much like Origins in terms of hardcore gameplay, and tactics, and they could have done it, even keeping the casual action style console version, but could have given more action slots none the less, and could have made decent keyboard/mouse controls, decent AI followers, decent tac cam, and they didn't, cause most of these things dont really affect the vast majority of people playing on the consoles. I doubt the percentage of people playing Nightmare/Hard, with friendly fire on Console comes even colse to the ones who actually are trying to play it that way on the PC, but thats a wild guess.