In 1985, Omelianchik won the Soviet National Championships, beating the future Olympic champion
Elena Shushunova. She also competed at the
European Championships for the first time, winning the
balance beam title showing a triple twist dismount. She also won a bronze medal in the all-around behind Shushunova and East German
Maxi Gnauck, silver on the
floor exercise, and bronze on the
uneven bars. Omelianchik continued to compete for the Soviet team after the World Championships, placing third in the all-around at the 1986
Goodwill Games and third all around at the World Cup in Beijing. She also won the balance beam title and placed second on uneven bars and vault and third on floor exercise. The
following year at the World Championships the Soviet team lost the title to a dominant team from Romania. Omelianchik debuted her new vault which introduced the half-on technique in the roundoff family of vaults. She also showcased a new floor routine to
Ballet Russe and a new triple full to a tuck front rebound, but suffered an uncharacteristic fall in the team competition. She placed fifth in the all-around and qualified only for the vault final; however, she was eventually withdrawn by team officials, with
Svetlana Baitova competing in her place. Despite maintaining consistent results within the top the 7 in the USSR Cup and USSR Championships for years, Omelianchik was not selected for the
1988 Olympics. She was named as an alternate to the team and traveled with them to Seoul, but was not called upon to compete. Her final competition was the 1989 USSR Cup, where she placed 2nd in the all-around. ==Post-retirement==