IIRC, the "redesign" that you are referring to went to the redesign of the chestplate, nose, and canopy designs.
No mention of any "redesigns" for the hips, or "other" known problems.
Besides, what's the point of buying it if you intend to remove the armor and make it to a regular figher? Didn't you buy it for how it looks with the armor on? Also, it's the end of that line (at least from what we all know). Any retooling of existing molds (hips and other issues you referred to) would have been expensive.