I made a topic a while back that died pretty fast that more manga should be colored after release like OP is, and I was met with similar responses about it. I decided it depends on the manga because I really can't see something like Berserk being colored and maintaining it's feel. Like, even the cover pages can look off. But for me, it's the opposite when it comes to OP. One Piece was definitely meant to be in color with it's cartoonish art style. For one thing, it makes everything easier to see, like you said. The Marine Ford arc is going to be useful for that by itself, but it's already helped with every arc that incorporated complex arc, like Impel Down does currently. It only really didn't give much help in early OP where things were a lot simpler. And the characters stand out all the movie with having unique color palettes as well as designs.
The only real downfall is that the fact that the there is a small glow around each character is much more evident and can become really distracting. In BW, you only sometimes notice it and can underrstand why it's there, because if everything was connecting, things would be REALLY hard to see. But that's not an issue with the colored version, so you just have this small white glow around everything like they're imbued with the holy spirit.
Still, I'd like to atleast have more options for manga in color.
