Guest Profile Progression and Local Co-Op Character Unlocks

When playing online co-op with my son using local splitscreen/a second controller, he signs in on a Guest Profile. Because my main account has already completed various missions, playing on the Guest Profile prevents us from re-completing those missions to unlock talismans/gear for him.

Additionally, when he plays solo, the Hero Selection screen defaults to my main online character because his progress is tied exclusively to the temporary Guest Profile.

Please update the profile system so guest profiles can either be saved/linked to a standard account or converted into regular selectable hero profiles. This would allow second players to access unlocked progression and play independently when playing solo.