I may be missing the mark here, but can you keep your saves and uninstall a game? I rarely have 10 games im actively playing as long as I have my saves I could uninstall the rest...
In theory yes but
1) How long does it take?
2) Should you have to?
I did a game install the other day and it took about 37 minutes, later on i deleted the game and that took about 5 minutes. I imagine some games may take longer than others but it is a unfortunate situation that should not be an issue.
Battlefield 4 – 33GB Dead Rising 3 – 19GB Killer Instinct – 3.4GB Ryse: Son of Rome – 34GB
Sounds like someone is going to need a bigger hard drive, although it'll need to be external as you cannot upgrade the Xbox One internal hard drive at this time.
Sorry to trim your post like that, but those are the games I am getting (well I want to try Killer Instinct first before I decide) it looks like around 90GB for me (out of lets say 450GB depending on how much Xbox One reserves for it self) that is not too bad at all.