While some of the mutations are interesting I feel like they could go farther with them. For example you could get tentacles that make it so you can pull yourself up elevation or pull forward an enemy at the cost of WP. You could have a shield or grenade launcher arm, the slithering body of a siren for extra movement or the scythe arms for melee based characters, you could even have wings that allow characters to fly up in the air to get a better view of the map or the ability to camouflage.
I really hope that the mutations we have now are just the start and that more will be added from updates or DLC because there just seems to be so much missed potential with the mutations and if you are worried about making Anu OP just give Jericho and Synedrion similar tech that would fit with the theme of the faction.