One could use DROP INDEX, ADD INDEX to simulate RENAME INDEX, but that will currently cause InnoDB to rebuild the index. The index rebuild should be optimized away, and only the index should be renamed. The InnoDB source code for renaming indexes exists starting with MariaDB 10.2, but it is disabled.
InnoDB should allow ALGORITHM=INSTANT operation for DROP INDEX, ADD INDEX when there is no actual data change. If an index is marked as corrupted, it would be nice to refuse ALGORITHM=INSTANT and actually rebuild the index.