I don't think it always is that they are bad, but that they may not be unique enough to merit introduction. If there are similar ones out there that are of equal or better quality, there's no reason to introduce them. Also they may not have good growing habits, or they may lack enough bloom. Have poor branching. Weak stems. I think one has to look at the total package. IMHO I'm not terribly fond of the shape of this last one. The falls droop too much and are kind of base narrow, and the standards are kind of strait up. It did have multiple sockets, and decent branching for a new seedling. I think there will be many of this cross that look like this color pattern. We'll have to see what next year brings. I have 61 of these siblings, and only a few bloomed this year.