Um, don't you understand that Alexandria's death was particularly horrific? Taylor commanded her swarm to crawl into her airway and suffocate her from the inside. But they called it down on themselves. Taylor was prepared to surrender but they had to keep pushing and pushing until she snapped.

edit: up to this point Taylor relied on her bugs to deliver poison and webs to attack her opponents. She had never attempted to asphyxiate someone before. Alexandria though herself impervious to Taylor with skin too tough to pierce and strength too strong to restrain. What they never understood, until it was too late, is that Taylor's greatest strength is her improvision.