Indeed to add onto it Seraphon are actually aware of what's going on around them. Slaan's even invest power into them if they need to handle solo stuff.
Hence why they are an option in shadows over hammerhal, I personally think it's kinda neat that we can have lizardmen stomping around cities now for whatever reason. The most fun part is when one of your players enjoys doing brawls to earn money and keeps winning.
Also a drunken brawler beating a stormcast in a fist fight.