Bringing in Forster in the summer instead of a keeper who could've potentially be considered a long term replacement for Lloris is unfortunately looking a bit negligent now isn't it?
How many teams have a top quality keeper sitting on the bench as back up? Even City don't have a top quality keeper on the bench, they have two average keepers coming to the end of their career. It's the same with just about every team. The only team that do have one is Liverpool with Kelleher and he wants to go out on loan at the very least to get game time.
In general top keepers of any age don't want to waste their time as a reserve. It's not like other positions were they will get game time to help development.