If someone manual stacks rooms, you don't join that guy's rooms.
Obviously there isn't much else to do with manual balance in GB besides fixing BB and CV balance. Which means the only problems with GB autostack are the parts that balance BBs and CVs. And if you think about that, what does autostack do right? Kita balance?
And recc because any manual balance is better than none at all, even though I don't see the need for limits and blitz needs manual balance even more than GB does.