Not sure I understand the desire for a 'unified' mech lineup, since there are so many different manufacturers (look at all the different computer cases out there; some are REALLY different from the others). Also, as far as I know, the Centurion was never the target of the unseen/reseen debacle; was it actually dragged into that?
Anyway, my general opinion, for what it is worth: if the Centurion looks like that, in-game, I will pilot it, I will love it, and I will appreciate the fact that one of the rear-facing medium lasers is now in the forward arc. I would like it to be slightly leaner, and with more human-style legs, and a head that sits on the shoulders rather than between them, but I can easily live with what it is right now, and enjoy the way it looks.
I will also appreciate the Pontiac 100, if I am able to mount one at some point.
