What are the User Task in OLAC and for an OLAC 2.0?

What overlap does DCTerms have with the IFLA-LRM/RDA models? That is, if OLAC stays with DCTerms, what user tasks is it known to not support? On the flip side, what user tasks do archives need to support beyond OLAC's capabilities?

Supporting literature:

https://www.researchgate.net/publication/235869817_The_actual_importance_of_RDA_elements_in_supporting_key_user_tasks
https://www.tandfonline.com/doi/abs/10.1080/01639374.2013.825827