Need more abilities to use Lilies on honestly. You get Solace/Lily System at 52 and then......nothing for over 20 levels until Rapture at 76. That's a huge gap in progress for something that is suppose to be an important tool for us to utilize. To make matters worse, I honestly feel like Cure1+2 have been almost entirely replaced by Solace since its essentially a free Cure 2 without the cast time. I've yet to find a moment when my Lily gauge is empty in fights and I'm just using Solace when I need to stop DPSing to heal up someone and I can't help but imagine Rapture will do the same for Medica once I unlock it.
Personally, I'm all for adding Protect, Haste, Brave, etc to the Lily system as WHM's utility toolkit.