Here's the actual rule book (emphasis added)
Interference on the Goalkeeper - This rule is based on the premise that an attacking player’s position, whether inside or outside the crease, should not, by itself, determine whether a goal should be allowed or disallowed. In other words, goals scored while attacking players are standing in the crease may, in appropriate circumstances be allowed. Goals should be disallowed only if: (1) an attacking player, either by his positioning or by contact, impairs the goalkeeper’s ability to move freely within his crease or defend his goal; or (2) an attacking player initiates intentional or deliberate contact with a goalkeeper, inside
or outside of his goal crease. Incidental contact with a goalkeeper will be permitted, and resulting goals allowed, when such contact is initiated outside of the goal crease,
provided the attacking player has made a reasonable effort to avoid such contact. The rule will be enforced exclusively in accordance with the on-ice judgement of the Referee(s), but may be subject to a Coach’s Challenge (see Rule 78.7).
IMO the Toronto player did NOT make a "reasonable effort" to avoid contact and it should've been goalie interference and no goal.
Just my 2c as a Sabres fan that hates both theses teams.
Edit- adding the contact outside the goal crease section of the rulebook
69.4 | Contact Outside the Goal Crease - If an attacking player initiates any contact with a goalkeeper, other than incidental contact, while the goalkeeper is outside his goal crease, and a goal is scored, the goal will be disallowed. |
| A goalkeeper is not "fair game" just because he is outside the goal crease. The appropriate penalty should be assessed in every case where an attacking player makes unnecessary contact with the goalkeeper. However, incidental contact will be permitted when the goalkeeper is in the act of playing the puck outside his goal crease provided the attacking player has made a reasonable effort to avoid such unnecessary contact. |
| When a goalkeeper has played the puck outside of his crease and is then prevented from returning to his crease area due to the deliberate actions of an attacking player, such player may be penalized, if by his actions outside of his crease he deliberately interferes with an attacking player who is attempting to play the puck or an opponent. |
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