Hello, thanks for your feedback!
As said on the plugin page, the new gen2 animals are supported, but in beta, so you can experience some troubles with them. We are working on them, but they are very limited due to some differences between gen1 and gen2.
About assigning tasks, can i see your config? Also, it would be good if you can provide some screenshots with entities you are trying to assign the task to, because this problem may be related to custom map.
About disappearing animals - are you experiencing this only with gen2 animals or with gen1 animals too?
About frankensteins - i think it's not caused by this plugin, because we are not using frankensteins in any way here