If he’s happy with 3rd of 4th choice, then I have no problem with that. Can be an Andy Lonergan backup to a backup type. His time with us in regards to the amount of games (and the type of games) he’s found himself in is Roy of the Rovers type stuff (on the individual view point).
If he signs (but imo we’ll not) then it’s a case of Adrian thinking the stars will align again and he’ll get into the starting eleven.
Makes some sense keeping him as third choice, better the devil you know and all that. The “Adrian will be Alissons number 2 whilst Kelleher goes out on loan” seems like a lesser version of the “Alisson is too expensive so Klopp has decided to give promising young Danny Ward a shot at the starting Keeper position” a matter of days before Alisson was bought and Ward sold to be Leicesters second choice.
I still remember how he single-handedly threw us out of Champions League after we already secured our second goals. We could have reached another final - winning is a different matter though, as BM was also very strong that year.