yeah, out of all the OG hime,
(Tyr, Satan, Sol, Gaia, Ares) and Shiva, she's the only one without an awakening (yet), plus she's really truly overdue one. They just didn't add one after Satan since Ea came pretty recently before her. She'll probably get something good though, as she's not really a helpful kami in DMMs stage of the game at least other than in accessories quests?
20% ATK to all allies would probably turn to 30% OR 20% and water elemental..
her large damage could have an extra debuff added to it, or just change the skill completely.. (or... 6.5x Water enemy to 1 enemy and -15% elemental debuff like Mars/Tsuku..)
the other ability can just be whatever..
I want to see Shiva get an awakening anyway, she's hot as hell and always had one of my favorite designs... I hope they just don't butcher it like they did with awakened Acala's design... ahh, she looked so much better before...