I really don't understand how some people seem to be upset about a game like this one taking 49GB of hard drive space. It's just progress. We would not have these games if they had to run off a disc. The performance simply isn't there. So...we have to have them installed.
I seriously challenge the people upset about this to REALISTICALLY explain how they would have 10-12 games like this installed all at the same time, and be playing each of them, to where this would cause a problem. Maybe a few exceptions are out there but on the average, people will not do this. So simply delete the game once you've played it through and aren't going back to it anymore. It's not like leaving it on the Hard Drive gives you an advantage since you'll still need the disc to play it.
If you delete it and suddenly decide you have to play it again, keep in mind that these game supposedly will start playing WHILE they're installing. So it's not like you'll have to wait 10 minutes or more each time you want to install and play something. Of course another option/solution is to do what you would do on a PC and upgrade the hard drive. Cheap enough.
Bottom line is that we've been told over and over how these consoles are more closely mirroring the PC architecture....so the need for more hard drive space shouldn't come as a shock to anyone, especially since we're also talking about HD graphics...perhaps even 1080p graphic resources.