Unless Invincible is off the charts great (meaning a lot better than the whole NJO series) then I don't think it can make up for what transpired in the 8 books before it.
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I do expect the Mandalorians will not be looked at in as deeply in detail as they were in Karen's novels but we'll see
"Changes are nice--but so is continuity!"
"Then you saved my life. How disgusting. How unfortunate."
"No, don't gush on so. It was nothing, really."