I really don't agree with him. TNG was great. And maybe it would be better if they made a little more drama and conflict. But just a little. DS9 had too much of it.
And now he's saying that Star Trek has too much continuity, and I don't agree with that either. I think that would be a problem for him, but a better writer could write much more Star Trek stories and keep that continuity.
Canon could be a problem if you are writing a prequel, but noth with sequels.