I don't konw if I'm reading this right, are there people in here actually defending blind research, and saying they used that option in SMAC?
If so, keep the spellbooks predicatble just to spite them.
As for the issue of randomized spellbooks itself, it depends how well stardock balances the spells with each other. Ideally, randomized spellbooks wouldn't hurt at all, because there will be enough good, viable spells that I won't mind losing some, and a lack of clearly superior spells that will cause a lot of frustration if left out of your spellbook roll. The worse the spell balance is, the more a predictable spellbook would be needed.
We'll see. At the very least, I hope they try the randomized version in the beta so we can see whether or not it can be made to work.