Honestly, I don't think that any good show should be reMADE. Mostly due to the fact that too many things could be changed, and the things that we love in the "old" version of the show might not become better. Rather so, a lot of the time that remakes are made, there are tons of people that aren't happy about the remake, that prefers the old one. And in a way, I feel that, there's no need to fix what ain't broken. Yes, and old anime is old, the animation might be dated, and all that, but honestly... This is anime. Anime never gets old, I've watched anime that was 100 years old, and surely it looks pretty crappy, but it was definitely watcheable by all means. Try watching a 100 year old TV show (assuming it would exist): I'm sure it would look so bad that it wouldn't even be possible to watch it, if you look past the fact that it would probably contain that old-fashioned type of acting that is just horrifying.
An anime that has say, 30 years on it's back, might look bad, but surely it can still be AMAZING. Besides, there are ton of people who like some anime just because they are old. That kind of people who thinks everythign was better in the past, and thinks everything new is shit.
What I woudl like to see however, would be a complete re-animation of Ergo Proxy. No new voices, no new story, no new NOTHING, just new drawings. The problem with Ergo Proxy is really so that, while they were making the anime, the studio was a bit low on money. In the first episode, it looks really cool, but all the way to the end the drawings and the animations keeps getting worse and worse for every episode. Every now and then you can notice extremely ugly frames, where it looks like someone who didn't quite know how to draw had drawed the frame. Despite the animation and frame problems, Ergo Proxy remains one of the best anime I have ever seen, and if they would change/remake it: I would probably not like it. It's perfect as it is, apart from the animation/drawing problems.
A remake ala Legend of the Galactic Heroes that is goign to start airing soon, is however a different thing. I believe they are going to focus on an entirely different storyline on this one, instead of remaking the same events. Or atleast it will be different, from what I have heard. It may be of interest to all fans of LOGH just because of that: because it won't be remaking the same events in the same way without the things that people loved about LOGH, instead they will offer more LOGH content to the fans of LOGH, which is great.
The differance might not be that big, depending on how you look at it, but I think there's a big differance between doing what LOGH is doing, and remaking a show, even if the new LOGH is considered to be a remake.