Lets see if and how rituals are implemented.
BG3 will not have a day/night cycle, so time is not moving forward, and it would be boring to watch a char standing there for 10 minutes to cast a spell.
In one of the Reddit AMA they confirmed that " Q) Is there any hope that we could see ritual casting, feats and multiclassing in BG3, as in D&D 5e? A) Feats and multiclassing: yes. Ritual casting not for EA, but we have plans"
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https://www.reddit.com/r/IAmA/comments/fhk1u3/im_swen_vincke_creative_director_at_larian/For the tabletop, bards could be one of the best ritual casters of the game if you add a feat, It´s very useful.