I think I am going for the Limited Edition but I think they should change the box. It's just too plain white and considering how good Blizzard is in designs and how much design is in the Overwatch universe, I don't think a plain white box is fitting let alone worth that high price.
Look at what Dark Horse did with the Metal Gear Solid LE Artbook:
That is looking like an ammunition box or something like that, really great work here. I also think it's not that great that they added the group picture form the cover of the CE box to the three prints. I think it would been better if all three prints are new art.
All in all I like the concept of the Limited Edition. The slip case with the magnetic closure is from my experience with the Metal Gear Solid V LE significant. I like the Tracer slipcover, it give the artbook itself an outstanding look and the prints are a nice bonus (but with 100$, I expect something like that). But I wouldn't mind if they would make it a bit more attractive, especially the plain slip case.