In 1600+ RM 1v1s there are 3 civs which remain in the top 5 while two are being swapped out. The deviance in winrates from 50% is also slightly higher compared to taking all ratings into account.
Berbers (out) and Teutons (in) had a small switch with both having decent but not top winrates while Goths (out) fall off quite a bit and instead Mayans (in) swoop in and take the first rank, dethroning Franks.