Vaguely surprised there was no representative of Loco Roco, and no Gong from Patapon. Also a little saddened to see the whip girl from Battle Arena Toshinden left out. And the Wanderer from SotC. I can see where the Jumping Flash people probably feel the same way.
I can't say it surprises me that Miku was left out, but it also would not have surprised me if she'd been included.
Would not be at all surprised to see Gong and Miku show up as DLC, assuming the game survives the holiday onslaught and anyone still cares about it in 6 months. --- Understand this: Game reviews are written by people who think being a "video game journalist" is possible.
I'm not so much surprised as I am disappointed to see that Wild Arms got absolutely no representation. Here we have a solid series; I mean it got 7 installments (including XF and the remake of the original), and they're all Sony exclusives. There's tons a great characters to choose from, and not even one is used.