Probably not. “Much is explained”
The question is does Mab still want payback from Namshiel.
My best guess is that Mab most definitely wants payback from Namshiel, but she's made an investment in Marcone. He's useful to Mab's plans. However, the thing about any investment; whether it's a financial or a business asset, is that eventually it get's used up, fully depreciated, depleted, scrapped or cashed out. If Marcone insists on holding onto his new partnership with Namshiel, Mab won't protect him from the consequences of his actions.
Plus, Marcone has made the same bet that he will remain in charge of all of his decisions; that Thorned Namshiel will remain the junior partner in their deal, that Nicodemus has claimed he has with Anduriel. If we see Marcone start to make questionable decisions, I mean decisions that run counter to the Marcone we know, it may be a sign that Marcone is losing his bet and it will be a time when Mab starts to think that Marcone's value to her has been seriously diminished, that maybe it's time to write him off.