LTIR affects cap floor but not cap ceiling?
I can speak generally about it.
Trading Weber did not free up any cap space or even a roster spot for Vegas. Dumping him only helps them during in the off-season when they are allowed exceed the upper cap limit by a certain amount.
So this really has very limited value to Vegas. Which is why they didn’t have to pay much to dump him.
Meanwhile, Ottawa had to give up a MUCH better pick to dump Zaitsev even though his cap hit is smaller than Weber’s and there are fewer years remaining in his deal. He’s not on LTIR so he impacts the cap.
Another consideration is insurance, and the fact that Weber’s deal was front-loaded, and the fact that Mayo is on a one-way contract, rather than a two-way. It all amounts to Arizona actually having to pay out less actual cash to Weber than they would have to Mayo. They saved real dollars.
If they don’t place Weber on LTIR he will count against the cap. Not likely to be a problem for AZ. And, in fact, should allow them to have a payroll lower than the actual cap floor. That’s more convoluted, though, and we don’t know for sure if that’s the plan. It’s an option now, however. Which is kind of a benefit.