I always figured GEO's terrain manipulation stuff would make it tough to implement because the game has dropped ground-targeting reticles for DPS jobs. Only the healers have one each, plus DRK's Salted Earth, and I think it's because they're relatively infrequent even used on CD. If skills like that are handled like Doton and just make the target the central point of the effect, I could be convinced hahaha. Those Sai Taisui in Swallow's Compass are pretty obviously offensive GEO concepts. I think some lore would need addressing to make it a support caster though, because of how it's been painted as a healing practice in-game already, I think?