I would say that the color issue is more to do with a cheaper plastic. Takara-Tomy uses cheaper materials than Takara did in all their products. You can tell right away when you compare Encore reissues with their 'Book' reissue counterparts.

I wouldn't expect the reissues to have as much 'long term' play value as G1. The G1 figures have considerably better production value than the reissues despite their age and wear.