I disliked good-evil (law/chaos, light/dark side, paragon/renegade, open palm / closed fist etc.) alignment mechanics in: Every. Single. Game. The one game that _almost_ managed to pull it off for me was Planescape Torment, but I very much prefer just pure choice & consequence, companions having different opinions/reactions about the PC's choices etc.
Faction allegiance "meters" are OKish. Maybe some more complex system (Disco Elysium, Pillars of Eternity comes to mind) could work - if HIDDEN. I absolutely loathe actually seeing any "alignment"/"personality" values on characters'/companions' character sheets. My least favourite element of P&P and cRPGs alike. D&D is shifting away from alignment mechanics and I say: Good riddance!
While there are some cool alignment-related mechanics (alignment having influence on skills/abilities) out there, I don't think they offset the limitations alignment poses for dialogue writing and the resulting cognitive dissonance we feel as players when our opinion about a specific choice's "alignment" differs from that of devs/writers (with P&P, you can at least argue with your DM, but when playing a computer game, you are screwed).