The combination of concentration locking (and all the new ways it can be broken in this game due to surfaces and things inflicting incapacitated when they should not) and the issue with saves, and how mobs seem to have bloated save values and get saves for things when they should not, has really affected Cleric. In addition, not all of the Cleric domains are available for us to test, and of the ones that are, trickster Cleric's invoke duplicity has been nerfed.
Cleric is normally a great class, even in boring old 5e. It's actually my favourite class to play and it can be very versatile. But the issues with concentration, and saves need to be fixed, otherwise Clerics in BG3 are going to continue to struggle.