DemonsWrath: More complex how?
I don't see how there's that much more.
Maybe shielding and dodging as well.
But... not that much more.
Let me give one strong example; The Witcher, played isometrically. There you have to switch between three fighting styles , and while you're just clicking with one button for physical attacks, timing is very important. But even with basic combat of 'click the enemy', anything that doesn't force you to quaff potions constantly to succeed is inherently superior. Hell I even found Arcanum's combat, which is notoriously flawed, to be superior, as it did not present such a barrier to entry. For an example for a strictly isometric game, look at Fallout, which implemented VATS targeting, action points, weapon type specific stat grounding, etc. It's far deeper than simply the method with which you conduct combat. Combat in Inquisitor, potions aside, is built on an inherently broken equipment mastery system.
Being dialogue heavy is not a bad thing; it is, after all, an RPG. Inquisitor's problem is that the dialogue is not very well written (or, at least, translated). I do have to disagree about Planescape's combat though, I found it to be entirely manageable, with only a couple of sections that presented a problem. I did play as a mage for much of the game, as that was most befitting my character attributes, but I could also manage with melee attacks, and my time spent as a Fighter was no trouble.
I will reiterate this. I am very glad people are enjoying it, more power to you for that. I can absolutely see why, the game has a brilliant visual style and sense of atmosphere, and the investigative angle is unique and interesting. But nonetheless, I strongly feel that the game is ruined by its frankly abysmal combat. In this area, it is quite simply beyond defence.