I feel your pain as far as descriptions are concerned, growing outdoors legally I only get six mature plants a year. I would love more descriptions, especially considering how much seeds cost. Although to be fair, I can understand how potentially problematic it would be to list things like finishing times. Everyone's individual experiences will vary based on phenotypes and growing conditions and unfortunately, invariably people get butthurt if their plants don't finish when the description said they should.
But, some description of the general range of phenotypical expression would be super helpful. I've curious about Coastal Seed Co, but with $150-$200 a pack and zero description, I just can't take the chance at that price point.
I don't think it is as big of a deal to indoor growers, because you can get any strain to finish indoors, and indoor growers can do so many cycles in a year that they can take more chances.
I have never grown anything from them(yet) but Dynasty genetics has great descriptions.