The rival\ friendship was really really good. it's a shame we never got a more evolved version of it. I think that although it might not work for every game, for the right settings it is the superior approval system for companions.

Larian's Biggest Oversight, what to do about it, and My personal review of BG3 EA
"74.85% of you stood with the Tieflings, and 25.15% of you sided with Minthara. Good outweighs evil, it seems."