I can't see any comments on that post. But he's saying that he'd add the drawlines back into the backgrounds if the characters were also 2D, but for 3D he'd leave them out? That makes sense.
As for the 2D vs 3D stuff - for my part, I'm only anti-3D in the specific case of a COMI remaster. 3D animation in general can absolutely be just as fantastic as 2D. And like I say, if they want to do a 3D remake of COMI, good for them (although the game wasn't designed for it so I feel like it would be a cost-saving measure rather than a creative one). But I personally want a faithful 2D remaster, so if they did a 3D remake at the expense of that, I'd be very disappointed. And perhaps a 2D/3D remaster could match the quality levels of the original's art and animation, but it inherently wouldn't be preserving it. (Besides which, I suspect that simply doing some new art and replacing the original assets with it would simply clash too much against the artistic direction and general design of the game, no matter how gorgeous it is).
Now what I would be very interested in is a 2D backgrounds/3D characters remaster of Escape From Monkey Island - imagine how gorgeous that game could look these days!
(Also, while we're here, my ideal remaster of the first two games - not that I think they need it, I'm happy with the originals - would be to get them to match the Purcell cover-art style in a way that the low framerate doesn't clash and looks like someone flipping through a gorgeously illustrated storybook. No voice-acting. Stick with iMuse just with better samples. And I wouldn't mind Skunkape Games getting their hands on Tales, doing all their usual polish, plus replacing some of the re-used character models etc. And then get Size Five Games to make Monkey Island 6. There, easy!)