If you had to free up space somewhere in order to upgrade the Leafs 2nd goalie, where would you subtract from? The Leafs are getting excellent value from their league-minimum forwards, and there's nothing to indicate that Dubas won't continue doing that moving forward, with marlies, KHL signings, and "legacy" deals (Spezza).
Forwards making above league-minimum (not named Auston Marnlandavares):
Kerfoot ($3.5-million)
Johnsson ($3.4-million)
Kapanen ($3.2-million)
Hyman ($2.25-million)
The player that, being moved, would hurt the Leafs the least I believe would be Kerfoot. With Spezza settling into 3C, and Gauthier, Petan and Shore options at centre (all making league-minimum).