Oh, I *so* want this feature.
First playthrough, I had ~200 savegames.
Second playthrough, I had over 500 (that was a completionist playthrough).
Now on my third V, and I already have a few hundred again. Even had to disable GOG syncing, since online ran out of storage.
More characters will definitely follow, as I still have to do Male Nomad, Female Corpo and Male Streetkid.
So, imagine we get some nice DLC's, and I want to continue playing those with my female Nomad.. I'll have to scroll down a looooong list of savegames before I arrive at her files. That's not really userfriendly. So being able to see saves for each character seperately is a must, in my opinion.