Like the topic says, please remove the disc change requirement for installed multi-disc games. Just make disc #1 required to be inserted at all times, that way MS wouldn't risk losing any sales from lending the other discs to friends etc.
I can't think of any reason for not changing this, especially when the PC works like this and the PS3 fits all content on one disc. Games that allow you to play through one disc at a time aren't that bad, but games that require constant disc changing, like Mass Effect, gets really tedious.
If you agree with this, please make your voice heard.