MP Grimlock in colour! :)

[kup]

Not a surprise to me considering that the MP line is aiming for show-likeness. All MP Autobots have blue eyes and Decepticons have red eyes thus far. I would've been pleasantly surprised if they'd gone with the red eyes for Grimlock.

The surprise is that it can alternate from both. Since it is a Japanese release I thought it would have fixed blue eyes for the very reason you have mentioned since the Japanese had no exposure to the comics and there is a strong preference in cartoon aesthetics.