Where was Tonya Harding in terms of the 1993 World Championships? Basically, she had a disastrous U.S. Nationals, finishing 4th (hampered by a cold). Consequently, she failed to make the team for Worlds. Here are her short program and free skate from Nationals. Nancy Kerrigan, Lisa Ervin, and Tonia Kwiatkowski (1st, 2nd , and 3rd at Nationals respectively) were selected instead of her. Kerrigan went on to finish 5th at Worlds, with Ervin 13th, and Kwiatkowski eliminated after the qualifying round in 31st place. I think it highly likely that had Harding been selected for Worlds, then fully recovered from her cold, she would probably have placed higher than Ervin and Kwiatkowski ultimately did. Hence, it was a poor decision not to select her.
Would Harding have been a medal contender at 93 Worlds? The major problem she had during this period was that she never managed to successfully land another 3A after 1991 Skate America and her career consequently went into decline thereafter as a result. She would never make the podium at a World Championships or Olympics again and her only top 3 finish at a major competition post 1991 was a third place at 1993 Skate America. She did "win" U.S. Nationals in 1994, but was disqualified in circumstances that are well documented.