Only ever implement trueskill as a hidden metric; after a sufficiently high number of games, the level of uncertainty drops and your players get 'locked in' to

Only ever implement trueskill as a hidden metric; after a sufficiently high number of games, the level of uncertainty drops and your players get 'locked in' to a certain rank and, while this is great for actually tracking skill, it gives the end user a feeling of helplessness. People prefer seeing a volatile and perhaps inaccurate skill that they can feasibly change to an extremely accurate one which is frustrating to move. Taken from experience as a Halo player (H2 used a points system kind of like regular elo, H3 used Microsoft's trueskill).