You just answered it. How can I not be impressed by this game? The controls are somewhat cumbersome, making gameplay sub-par. It's too hard to move and fight as a ranger, especially when framerate hiccups occur. I played WoW for a long time (2008-2013, with breaks every 2-4 months), and I was a Hunter the whole time. I am used to a style of play that requires good mobility and an ability to kite (for those who don't know, kiting it basically running an enemy around so you can hit him, but he can't hit you). Order & Chaos really makes mobility in fighting a pain. They essentially combined the Rogue and Hunter classes of WoW, and I don't like it. In most games I've played, be they MMOs or shooters (or, in the case of Defiance, both), I've preferred the ranged style of play. I like shooting people from a distance on Halo and Call of Duty. I loved being a Hunter on WoW, and having to watch myself and move to avoid things.
Order & Chaos does not reasonably offer this play style. The Ranger is too competent in melee range to promote the movement-based play of a Hunter in WoW. The left stick is too prone to missing your input to make movement consistent, and the framerate prevents fluid movement. Having to swipe to keep the camera facing the right way makes moving and seeing your target a bit tough as well. As a Hunter, I was used to things like strafe-running and shooting, or jump-shooting while kiting. These are experiences that the style of play and the method of input prevents. It's what makes Order & Chaos fail as a WoW clone, and it's not the game's fault. Touch just doesn't work for an in-depth MMO, and I don't enjoy the shallow style of this as much.
All of that said, it's not like I am calling the game bad. I am just saying that I cannot enjoy the game with touch input. I need a controller to have fun with it. If I am going to pay $7 for a WoW clone, I'd like my style of play in WoW to translate, but it doesn't. That, and given the nature of mobile gaming (where you tend to play for short bursts of time, rather than the hours of time spent on a FPS or MMO in a row), it's tougher to commit to learning the ins and outs of Order & Chaos when I only care to paly for 15 minutes at a time, if even that.