5 seasons isn't considered long? It's two years longer than TOS and one year longer than Enterprise. I thought TV shows had to sink or swim fast in this day and age.
What I mean is it won't go to 7 seasons and obviously there will be a lot fewer episodes than the other spin offs since the seasons are shorter. Discovery doesnt as yet appear to be a show with legs. It seems to be dependent on Burnham's journey rather than being an ensemble or an action/science fiction drama like the other spin offs. That's more restricting than any amount of established canon could ever be. At the very least canon can be worked around. Having such a dull and unlikeable (in my opinion) focal point as the main draw can't.