You're expecting too much. I don't think Christopher Tolkien approaches this like a novelist. He's just a curator of his father's work and he approaches filling in the blanks more like someone extrapolating missing verse from the dead sea scrolls. The end result is mostly an academic pleasure.
Well I wasn't expecting too much given his age. But I enjoyed Children of Hurin well enough and would've liked to see the guy closest to Tolkien hammer out, as best he could, a single narrative. Especially given that these were the tales that seemed closest to his fathers heart. I understand why he's taken the curator approach, I just don't think he needed to once we got into the 00's. Those fans in the 60's and 70's were far more fanatical than fans of today. Once upon a time there would've been much gnashing of teeth over something like this show which will make a lot of stuff up. Now people seem generally excited about it.
Also, I think once Christopher is gone that the family will allow authors to come in and write new tales set in Middle Earth. It may be a decade or so after he passes, but I believe it to be inevitable and I would've preferred he be the one to do so. What he ended up with isn't just an academic pleasure, it's a strictly academic pleasure. My opinion is such that I don't think it's disrespectful for the son to complete the work of the father as best he can, as long as he acknowledges in the work that it's his best assessment for making a singular narrative in order to get those tales closest to his fathers heart out there for all to read.
I love the Silmarillion as published and thought Christopher did just fine with what he had to work with.