Based. Locking Minthara behind a single path (any companion for that matter) sucks.
Much unlike OG BG game,, BG3 is a very companion-centric much like a later BioWare's project Dragon Age Origins which allowed to recruit every single companion w/o need of any to die.
Hells, Minthara vs Helsin sure have a potential to be a new Alistair vs Morrigan.
Well, I do think, that things between Minthara and Halsin are a bit different. While Morrigan is just bitchy and Alistair in his endless naivity an easy victim for her insults, Minthara had Halsin locked up with the intention to torture and murder him and then attack and murder his people. If I were Halsin, I would just kill her on sight and not tease her Morrigan/Alistair style. I don't see, how those two would work out realistically tbh.