NPC disposition: negative faction reaction modifier doesn't take PC rank into account
OpenMW does take rank into account for the positive faction reaction modifier: https://wiki.openmw.org/index.php?title=Research:Disposition_and_Persuasion
x += (fDispFactionRankMult * rank + fDispFactionRankBase) * fDispFactionMod * reaction but doesn't do the same for negative reactions.
There is also a design bug in vanilla. Only the faction with the most negative reaction is used, even if rank in another faction should have given a more negative reaction. Example: Temple has -1 reaction to Telvanni, and -3 reaction to Sixth House. If the player is rank 9 Telvanni, they get -17 disposition with Temple NPCs, if that player joins the Sixth House, it turns to -3 disposition because the Sixth House modifier is used instead.
(RM-4322 from redmine: created on 2018-02-09 by rot tor, , closed on 2018-02-11 by Andrei Kortunov)