The only criticism I have about the class (aside from Varric's AI being horrible at using the skills effectively) is that it'd have been nice to have more unique skills to compliment our particular weapon of choice, as the mines and traps are far less useful for archers as you're rarely in range to use them. Having some variety of trick arrows, such as those with elemental effects, would have probably suited archers more.
See, I think it's the other way around! Because archery is about controlling the field, and the Artificer abilities are all about control and range. The traps are supposed to be set in advance, either from stealth or out of the line of sight of enemies, then triggered when a meleer closes in on you, so their most effective use is in keeping enemies off your close range - you set the Spike Trap around you, like a ward, snipe with Full Draw, and when the aggro'd enemy you hit comes after you they'll get caught in your trap as you run away.
Then you have the Elemental Mines, which are crowd-control tools for when your ranger gets surrounded. You don't use them offensively just to cause damage, you use them defensively to stun enemies clustered around you while also causing damage on top - so with the mines you can replace both Throwing Blades and Toxic Cloud (which cause damage but don't stun) and Knockout Powder (which stuns but doesn't cause damage), shaking your enemies off and giving you time to run out back into range. And then you have the Fallback Plan, which is your Hail Mary as a ranger - your Stealth is on countdown, your Mines are on countdown, even your Leaping Shot is on countdown, so you have no way to gain distance? Fallback Plan will forcibly pull you out of the melee mess and back to wherever you set your safe zone. This is such a life-saver ability on higher difficulties, specially against dragons and elite bosses - zone out, drink some potions, clear your cooldowns, and start firing again (from your new safe distance, to get higher crit bonuses of course). That's why I think this spec was made for archers, because it's all about keeping you away from the danger zone, and keeping people off your back.
But! You're super right in that, oooooooooh boy, what I wouldn't give for trick arrows. *__* Having more trick shots than just Poisoned Arrows and Explosive Shot would have been amazing - I miss Origin's ice arrows, fire arrows, mana-draining arrows etc, DA2's version of the Hail of Arrows that was just a rain of arrows on everyone's bums...
Imagine the ridiculous fun Dagna would have coming up with crazier and crazier trick shots for the Inquisitor! (....and the Inquisitor's face as they go, are you sure this is safe??
)
(also you're 100% correct that Varric's AI is bollocks and the spec is wasted on him, too. I don't even bother giving him any skills in that spec anymore because Varric will never use them in the engineered control way they're intended to be used; he'll do a lot better just speccing fully into Sabotage and spamming Caltrops, poison and Throwing Blades all over the place)