I enjoy picking over a design I really love and finding inconstancies and difference between multiple versions.
Sure, but folks complaining that:
(a) their favorite fig isn't being produced but this one is
(b) that this must mean the Mk. 1 and 3 will be re-released (they likely won't, as they did not see action in IM2)
(c) this is just a re-hash of an existing mold
are generally missing the point, IMHO.
Proto pics are just proto pics & at the end of the day, these are just high-end plastic toys.