I think the wobble is one of the most over hyped things in ball pythons. I have no issues with breeders who refuse to implement them in their projects. I just find that spiders have one of the best personalities and feeding responses of BP morphs and they enhance all morphs IMO. They are one of the morphs that really made me say "WOW, I NEED THAT" back in the day when they were worth over $1000, and they still amaze me only being worth $100-200.
I don't think it gets worse or better through combo morphs, it's a risk you take. The majority of them live great lives under the right care. I refuse to not have one in my collection, my male is by far the best snake I have ever came into contact with. Out of all my snakes, he is the one that will never go if I had to get rid of my snakes...soooo maybe I'm a bit biased. Hahaha