I don't think there's one right answer to this, if there were, it require lots of scientific testing, years of keeping and breeding this morph with different blood lines, different conditions, etc. which would cost a lot. I also think trying to find one specific answer to this debate is a reason why they passed that law in UK reptile shows. Just my opinion.

I think the overall questions are these. If you choose to breed spider BPs, are you comfortable with knowing you will see wobbling from time to time? Are you comfortable with the POSSIBILITY* of having to cull a higher percentage of animals than you would with a different gene? Are you confident that you will produce healthy animals (this goes for breeding any animal of course)? Do you believe and does your experience with Spiders indicate to you that the snake is not in pain (open to opinion)? And are you able to stand by your product truly knowing you are selling a healthy animal?

Let me just say I have never kept a spider, not because of anything wrong with it, just because I never got one. But I think these questions need to be taken into consideration.