Okay, you're right, it's not just like Allomancy, or some knock-off of it in any way. I think what I was trying to describe was my dissapointment in it being just another martial magic system--one seemingly designed to just make for cool fights. (You can make up examples of how Lashing can be used for other things, I'm sure, but it does seem to be focused a lot around how it can be used in battle.)
Allomancy was a martial artist's magic system, and made for intriguing and beautiful battles. I guess I just didn't want the New Magic System (which I've only seen a little of, and is only one of 109234912 magic systems in the series) to be another "fighting" magic, because Sanderson's already written the most compelling "fighting" magic. We don't have to reinvent Jedis every two seconds.
Again, I've just read the prologue, and I won't say I know exactly how Lashing works and is gonna play out in the narrative; it'll probably be fine. I just know I wasn't as excited about it, when I first came upon it, as I thought I'd be.
But when Kelsier first burnt tin in Final Empire, I was like "Woah, this sounds like an awesome magic system." This time, I was like "Okay, so his magic makes him beat up lots of guys like a Jedi." Szeth lands in the middle of a ring of armed soldiers sworn to die to defend their king, and he kills all of them without any of them landing a blow with a spear? Does the arm holding his sword swivel 360 degrees around his body in less then a second, or did half the ring decide to wait their turn before they stuck Szeth in the gut? That's really nit-picky of me, and I love me a dramatic "one awesome guy kills lots of extras in battle" scene, but it shows that this is all about making certain people seem really cool in battle, a lot like Jedis with lightsabers, at the expense of a little realism.
I mean, I have to admit, I kinda like that. But I just hoped that the first magic we'd be seeing would have a little more depth to it than "Use this to kill guys." At the same time, there are traces of a lot of other interesting magical elements in the world, like the Shardswords and the mysterious nature of the Stormlight, that I did very much like. Also, maybe Lashing only seems like too much of a martial magic to me because the entire prologue followed the steps of an assassin.
Maybe nobody else felt the way I did, and maybe it's very clear for everybody else how Lashing is nothing like Allomancy. I just wasn't scrambling to sign my name onto the subscriber list for the Official Lashing Newsletter, and I kinda wanted to be.