That is what I was attempting to suggest., which I guess wasn't clear from that example.
While a player is on LTIR the team is eligible for a cap re-reimbursement per day on IR, and that gets applied to the healthy replacement player who can earn up to the same amount or less than the injured player, and then essentially those players salaries overlap for cap management purposes. If in this above scenario if Muzzin were to miss 60 days on LTIR than Leafs would have up to that amount of accrued LTIR to re-invest in a healthy roster player during that time on LTIR for those 60 days.
If a player is only on short term IR then the team is allowed to exceed the 23 max team player limit, but both the injured and healthy replacement player would both count against the teams annual salary cap upper limit, where on LTIR those two players overlap for cap calculations,
Some fans are getting confused trying to go with a 20 p;layer roster to be cap compliant for the Leafs, but if John Tavares & Pierre Engvall and Tim Liljegren who are all currently injured and if they began in short-term IR (not LTIR) then you only have 17 healthy players, and you would need to add +3 more healthy players to replace them = roster size of 23 not 20 players, & all 23 players of those players would count against the teams salary cap and need to fit below the upper limit of $82.5. Leafs growing list of injuries are complicating the Leafs salary cap further with a team already exceeding the upper limit at present.
That is why I believe Leafs likely intend to place Engvall and Liljegren on LTIR to start the year meaning they can be replaced with healthy players making equal or less AAV, but will also then be forced to miss 10 games or the first month essentially.