Biggest issue with broodmother is that her lings get zero collision now. It's fully possible to stack 40 of them on the same spot which makes it fully possible to have them all hit someone at the exact same time. Good luck being a support CM in a lane where brood can instant hit you for half your health and then cast spawn spiderlings for the other half. This not only makes her impossible to kick out of a lane, she will flat out kill most heroes early game now.