I only cam across this thread recently, and have only read a few relevant bits. Still, Deus Ex has no more buttons than Unreal 1. The only extra buttons I'm aware of is the right mouse button, which allows you to interact with the environment and put away your weapons simultaneously, and the menu/augmentations buttons. Otherwise, it's still pretty straightforward. If you wish for the action to be better, just train yourself to be a better marksman or melee fighter ahead of time, that way you don't have to wait too long aiming at the enemy's head to dispatch him/her quickly.
I am perplexed why a fan of the Unreal games, especially Unreal 1, would complain about polygonal graphics that are at least more realistic than the polygonal graphics in preceding games. Is it because Unreal Gold/Unreal Tournament 1 are smoother? I personally love it's graphical style, the same way I like the classic polygonal models of Unreal, Quake, and Dark Forces 2. They're like modern art sculptures converted to game graphics.
I do, however, find it strange that the intense AI of Unreal/Unreal Tournament 1 should be lost in Deus Ex. It would have been cool to see the enemies with more animations and movements, but I still think the enemy's AI during the stealth gameplay is remarkable achievement, EVEN if they are easy to dupe (though at times, they can be surprisingly sensitive, if not always slow). So what if they lose you easily? You're a special agent! You're supposed to feel like one! And the point of feeling like one, is that you're smarter than the enemy thinks you are (not to mention, smarter than the enemy themselves). Besides, manipulating the enemy AI to follow you into a vent, or notice that the vent is open, or other AI quirks, have not been mastered yet during that time. It may be mastered now, but enemy AI still has far to go.
As for the stiff animations, when you're coverting an insanely fast game with fluid animations to a slower action RPG with multiple approaches, stiffiness is to be expected. Okay, maybe that's not a good explanation. Look at System Shock 2, for example. It's been praised by PC Gamer for being funner than Half-Life, but it's animations are rather stiff during combat, and are not as sophisticated as Half-Life's. Deus Ex is pretty much the Unreal engine equivalent of System Shock 2, and while both are not super fluid in their animations, their role-playing elements are quite advanced for a first person shooter.
Deus Ex's plot is predictable, but it was never meant to have an unpredictable plot full of twists, like Metal Gear Solid or Legacy of Kain. It's inspired by Metal Gear Solid, but it states right away that the people you working for are conspiratorial evildoers. It's deliberately cartoonish in much of the game, which adds to the game's fun.
In all, Deus Ex is very much the super RPG offspring of Unreal 1. Warren Spector himself said that he appreciated that sophistication that went into Unreal, but felt more could be done with it. He must have noticed how in Unreal, you could choose to explore a level more, either in search of better items, or to learn more about the story. Of course, there's also the element where if you save a Nali from getting killed, or not kill them, they'll help you, and give you a reward. He certainly expands upon this concept, because all of the civilians in Unreal, I think, are Earthling incarnations of the Nali: you either become their savior, or kil them because you hate them, and there are consequences either way.
Take my advice: just try to play the game as is, and experiment with every gameplay tactic you can away with, and see what happens.
Train yourself in the skills you think will make the gameplay easier for you. If you're having a hard time on the difficult setting, play on easy for awhile: you'll enjoy the game more (until you need more of a challenge). If you still can't understand it, play the tutorial level until you feel you know how to do the game (unless of course you, like me, had trouble passing the stealth bit of training, and skipped right to the main game). Keep in mind, too, that you don't have to use every single augmentation just to play the game right, so you don't have to bother with too many buttons. All you need is the WSAD keys, the crouch button, the right and left mouse button, the jump button, and F1 for menu. It's not that hard.
However, I've long since mastered how to play the game, so I am surprised when other are slow at it, so I should be more sympathetic. Although, I do get irritated when Half-Life players complain about jumping in HL1, or about the long-jumping puzzles in Xen, like jumping is the hardest thing to do.
Ed: I see, Leo, that you already beat the game, so don't think that this applies to you. Think of this as applying to others who still don't get the game.
